Exploring the Moon
(9-Adult) The Moon is as old as the Earth, and its surface is marked by craters and lava flows billions of years old. Explore these lunar features through a high-powered telescope at Observatory Park at Turner Farm and learn about their origins. See where the Apollo lunar landings occurred, and discuss what the astronauts found. Session held from 7:30 to 8:30 p.m. rain or shine with alternate viewing sessions available if cloudy. The cost is $8 per person. Call 703-324-8618.

69th Annual Fairfax County 4-H Fair and Carnival, August 3-6
Come to the 4-H Fair and Carnival at Frying Pan Farm Park for old-fashioned country fun with carnival games, rides, exhibits, Big Truck event and a tractor pull. Admission and parking are free on Thursday and Friday. Purchase unlimited carnival ride passes valid for use Thursday and Friday from 10 a.m. to 3 p.m.: $16 per person if purchased by 8 p.m. on July 26; $18 if purchased July 27 through 8 p.m. on August 1; and $25 the day of the event. Pick them up across from the carnival entrance under the tent on the day of the carnival. No refunds. Admission to the 4-H Fair is free. Weekend parking is $8/car/day. For more information, call 703-437-9101.

Flora Fauna-Summer Series
(3-6 yrs.) Join Hidden Pond Naturalists for a summer of exploration with a different topic each week. Come for one or sign up for all. The series meets from 11 to 11:45 a.m., and the cost is $5 per child for each session. Children must be accompanied by an adult. Call 703-451-9588.

Jr. Farmer Family Fun Series
(2-Adult) This family program goes behind the scenes to help farmers at Frying Pan Farm Park with chores such as milking the cows, feeding the animals, and shelling corn. Topics and activities vary each week in this four-part series that meets from 4 to 4:55 p.m. The cost of the series is $42 per person, and children must be accompanied by an adult registered in the program.

Ready, Set, Grow: Agriculture in the Classroom for Elementary Teachers (K-5)
(Adults) This highly interactive, professional development workshop at Green Spring Gardens helps you sprout successful learners in your K-5 classroom. The workshop from 9 a.m. to 1 p.m. features cross-curricular, standards-aligned lessons and resources that use Virginia agriculture and natural resources to engage learners in science, mathematics, language arts and social studies. Leave with resource kits full of curriculum, books, posters and a class set of laminated Virginia maps. The workshop is free, but space is limited and registration is required. For more information, call 703-642-5173.

69th Annual Fairfax County 4-H Fair and Carnival, August 3-6
Come to the 4-H Fair and Carnival at Frying Pan Farm Park for old-fashioned country fun with carnival games, rides, exhibits, Big Truck event and a tractor pull. Admission and parking are free on Thursday and Friday. Purchase unlimited carnival ride passes valid for use Thursday and Friday from 10 a.m. to 3 p.m.: $16 per person if purchased by 8 p.m. on July 26; $18 if purchased July 27 through 8 p.m. on August 1; and $25 the day of the event. Pick them up across from the carnival entrance under the tent on the day of the carnival. No refunds. Admission to the 4-H Fair is free. Weekend parking is $8/car/day. For more information, call 703-437-9101.

Turtle Pool Party
(2-Adult) Turtles like to soak and take in the sun. Come by our Visitor Center deck at Riverbend Park to watch our turtles enjoy some outdoor time. Afterwards, go on a scavenger hunt and hike around the park. The program from 4 to 5 p.m. is free! For more, call 703-759-9018.

Riverside Campfire - River Revelry
(2-Adult) Enjoy a fun-filled evening of stories and games at Riverbend Park from 6 to 7:30 p.m. Learn about otters, beavers and other animals that call the Potomac home. S’mores are provided. The cost is $8 per person. Come early if you want to bring a picnic or hot dogs to toast. Bring a toasting stick, blanket and flashlight. Children must be accompanied by a registered adult. Meet at the visitor center. For more information, call 703-759-9018.

The Moon and the Stars Campfire
(2-Adult) Meet at Cabell’s Mill and talk about the moon and stars around a warm campfire. Then head out into the meadow at Ellanor C. Lawrence Park with a naturalist to learn how to identify the summer constellations. Enjoy s’mores around the campfire. The program from 8:30 to 10 p.m. costs $8 per person. Children must be accompanied by an adult registered in the program. For more information, call 703-631-0013.

69th Annual Fairfax County 4-H Fair and Carnival, August 3-6
Come to the 4-H Fair and Carnival at Frying Pan Farm Park for old-fashioned country fun with carnival games, rides, exhibits, Big Truck event and a tractor pull. Admission and parking are free on Thursday and Friday. Purchase unlimited carnival ride passes valid for use Thursday and Friday from 10 a.m. to 3 p.m.: $16 per person if purchased by 8 p.m. on July 26; $18 if purchased July 27 through 8 p.m. on August 1; and $25 the day of the event. Pick them up across from the carnival entrance under the tent on the day of the carnival. No refunds. Admission to the 4-H Fair is free. Weekend parking is $8/car/day. For more information, call 703-437-9101.

Campfire Saturdays: Stargazing
(3-Adult) Enjoy a stroll along the shore at Burke Lake Park and learn about the constellations and other night-sky features. Our astronomical naturalist identifies the stars for you and lets you try out a telescope. The program concludes with a campfire. S’mores ingredients are provided; hot dogs are welcome. The program from 8 to 9 p.m. costs $8 per person. Children must be accompanied by a registered adult. Call 703-323-6600.

English Garden Floral Design Workshop
(16-Adult) Create the look of a summer English garden for your home using an assortment of cut flowers, greens and garden materials. Reuse the container to make another design of your own with the skills you learned in this class at Green Spring Gardens. The workshop from 9:30 to 11 a.m. costs $38 per person, plus a $25 supply fee. Please register for both. Call 703-642-5173.

Pancakes at the Mill
(4-Adult) Meet at Cabell’s Mill at Ellanor C. Lawrence Park and enjoy some time around the campfire. Make corn pancakes with honey while discovering the little-known history of the place we now call Cabell’s Mill. The program from 11:30 a.m. to 12:30 p.m. costs $8 per person. Children must be accompanied by a registered adult. For more information, call 703-631-0013.

National Night Out Campfire
(2-Adult) National Night Out is August 2, but we continue to honor our law enforcement community at Ellanor C. Lawrence Park. Visit with Sully District officers who will bring squad cars and offer safety demonstrations from 7 to 8 p.m. Enjoy a campfire, too. It’s free! Call 703-631-0013.

69th Annual Fairfax County 4-H Fair and Carnival, August 3-6
Come to the 4-H Fair and Carnival at Frying Pan Farm Park for old-fashioned country fun with carnival games, rides, exhibits, Big Truck event and a tractor pull. Admission and parking are free on Thursday and Friday. Purchase unlimited carnival ride passes valid for use Thursday and Friday from 10 a.m. to 3 p.m.: $16 per person if purchased by 8 p.m. on July 26; $18 if purchased July 27 through 8 p.m. on August 1; and $25 the day of the event. Pick them up across from the carnival entrance under the tent on the day of the carnival. No refunds. Admission to the 4-H Fair is free. Weekend parking is $8/car/day. For more information, call 703-437-9101.

Grinding Demonstrations
(All ages) See and hear 19th century technology at work at Colvin Run Mill. The miller will be grinding, conditions permitting, from noon to 3 p.m. Please call the site to confirm. The tour costs $7 for adults, $6 for students 16 and up with ID, and $5 for children and seniors. No reservations are required. For more, call 703-759-2771.

Afternoon Teas with a Difference
(Adults 21 yrs.+) Celebrate Britain’s National Afternoon Tea Week with a special “Royale Tea” at Historic Green Spring that offers you a choice of a glass of champagne at the beginning or sherry at the end. Discover playful twists on teatime traditions across the UK this week and alternative afternoon teas served up year-round. The cost is $42 per person for this tea from 3 to 4:30 p.m. Reservations are required. Call 703-941-7987.

Wagon Ride-Journey to the Potomac River
(2-Adult) Enjoy riding through the woods and along the Potomac River from 10 to 11 a.m. while finding out about Riverbend Park’s wildlife and the American Indians who once lived here. The cost is $7 per person. Children must be accompanied by an adult registered in the program. For more information, call 703-759-9018.

Sundaes in the Park
(2-Adult) Bring the family for a Sunday stroll along the paths around Hidden Oaks Nature Center with a vanilla ice cream sundae. Sundaes are $2 each, and the woodland walk and visit to Nature Playce are free. The event runs from 1 to 3 p.m. Preregistration is preferred but not required. For more information, call 703-941-1065.

Water Critters
(2-6 yrs.) Explore the wet world of otters, crabs, turtles, frogs and fish through songs, story and a visit to a pond. Meet live turtles and frogs. This 45-minute program at Hidden Oaks Nature Center begins at 1 p.m. on August 8 and at 10 a.m. on August 22. The cost is $6 per child. Children must be accompanied by an adult. For more information, call 703-941-1065.

Bats
(7-Adult) Walk the meadows and forest edges at Lake Accotink to see bats feeding on insects. Use a bat detector to hear echolocation. Learn about our native bats from 8:30 to 9:30 p.m. The cost is $6 per person. Children must be accompanied by a registered adult. For more, call 703-569-3464.

Summer Reading Puppet Show
(3-Adult) Young story lovers are invited to Green Spring Gardens at 10 a.m. for a puppet show by Carousel Puppets. You’ll see bunnies, birds and a host of woodland creatures in this colorful and musical show. The cost is $4 per person. Children must be accompanied by a registered adult. This program is sponsored by Friends of Green Spring. Call 703-642-5173.

Flora Fauna-Summer Series
(3-6 yrs.) Join Hidden Pond Naturalists for a summer of exploration with a different topic each week. Come for one or sign up for all. The series meets from 11 to 11:45 a.m., and the cost is $5 per child for each session. Children must be accompanied by an adult. Call 703-451-9588.

S’mores & Campfire Stories
(6-Adult) Join Lake Fairfax staff for a night of campfire stories while enjoying s’mores. The program from 6:30 to 8 p.m. costs $8 per person. For more information, call 703-471-5414.

Riverside Campfire - Terrific Turkeys
(2-Adult) Wild Turkeys roam the meadows and riverbanks of Riverbend Park. Learn about these elusive and seasonal birds with games and activities from 6 to 7:30 p.m. Bring a toasting stick; s’mores are provided. The cost is $8 per person. Come early if you’d like to bring a picnic or hot dogs to toast. For more, call 703-759-9018.

Turtle Pool Party
(2-Adult) Turtles like to soak and take in the sun. Come by our Visitor Center deck at Riverbend Park to watch our turtles enjoy some outdoor time. Afterwards, go on a scavenger hunt and hike around the park. The program from 4 to 5 p.m. is free! For more, call 703-759-9018.

Pop Up Museum: Fairfax County at 275
(2-Adult) Come share your Fairfax County memories at a pop-up museum to commemorate the county’s 275th anniversary. A pop-up museum is a special temporary exhibit created by people like you who display objects such as old yearbooks or family heirlooms that connect them to Fairfax County. This museum pops up at Ellanor C. Lawrence Park from 1 to 4 p.m., and it’s free. Registration is required to exhibit an object. Walk-in visitors welcome. Call 703-631-0013.

Garden Tour, Ice Cream Social and Exhibit
(Adult) Stroll through Green Spring Gardens with a Master Gardener docent, then cool down at an ice cream social in the 1784 Historic House. Enjoy delicious ices and toppings and view a special limited-time photo exhibit on the fascinating history of the house. The program from 10 to 11:30 a.m. costs $12. Call 703-941-7987.

Boardwalk Astronomy
(12-Adult) What’s new in the night sky? Join naturalists at Huntley Meadows Park as they take you on a tour of constellations, comets and other current events happening in the heavens above. The program from 8 to 10 p.m. costs $8 per person and will be canceled in the event of rain or other severe weather. For more information, call 703-768-2525.

Meteor Astronomy
(10-Adult) This session at Observatory Park at Turner Farm covers basic meteor astronomy. It includes what meteors are, their origins, best time to view, fireball reporting, visual and video observing techniques, movie clips from past meteor storms, how one estimates trajectory and orbits, and other instrumental techniques used by amateur meteor observers. An optional outdoor observing session will be held after class, weather permitting. Bring a lawn chair and warm cover/sleeping bag. Class meets from 7:30 to 8:30 p.m. and costs $8 per person. For more information, call 703-324-8618.

Wagon Ride-Birds, Butterflies & Blossoms
(2-Adult) Take a wagon ride scavenger hunt through the meadow at Riverbend Park from 10 to 11 a.m. Search for birds and butterflies and meet a friendly animal up close. The cost is $7 per person. Children must be accompanied by an adult registered in the program. For more information, call 703-759-9018.

Dragonflies
(12-Adult) Dragonflies are cool! Learn about the life cycle, behavior and identification of the many dragonflies and damselflies at Huntley Meadows Park. Venture to the wetland to observe these acrobatic fliers in action. This program from 9 to 11 a.m. costs $8 per person. It will be canceled if it rains. For more information, call 703-768-2525.

Little Hands on the Farm
(2-5 yrs.) Join us in the Kidwell Barn at Frying Pan Farm Park to meet a farm animal, enjoy a story, craft or game, and pretend to be the famer with fun chores. This is a program your child will remember! Sessions for children age two to three run from 9:45 to 10:30 a.m. Sessions for children age three to five run from 11 to 11:45 a.m. The cost is $8 per child. Pre-paid reservations are required. An adult must attend the class with the child. For more information, call 703-437-9101.

Animal Feeding at the Nature Center
(3-Adult) It’s dinner time at Hidden Pond Nature Center and worms and insects are on the menu. Help our naturalist care for and feed the nature center’s animals from 4:30 to 5:30 p.m. The cost is $5 per person. For more, call 703-451-9588.

Useful & Edible Native Plants and Trees
(12-Adult) Come to Burke Lake Park from 9 to 11 a.m. to learn about native plants and trees in the wilderness (or your own backyard) that offer food and so much more. Find out which plants are safe to eat and those to avoid. Learn the right weeds and trees to help start a fire, get a drink, find a meal, make a rope, stop an itch or heal a wound. Explore with us the trails, fields and forests of Burke Lake Park and see what Mother Nature is growing just for you. Bring water, snack, rainwear, and wear suitable outdoor clothes and hiking boots/shoes. The cost is $23 per person, and the program runs rain or shine. For more information, call 703-323-6600.

Flora Fauna-Summer Series
(3-6 yrs.) Join Hidden Pond Naturalists for a summer of exploration with a different topic each week. Come for one or sign up for all. The series meets from 11 to 11:45 a.m., and the cost is $5 per child for each session. Children must be accompanied by an adult. Call 703-451-9588.

Homeschool Day
(5-12 yrs.) Bring your homeschool student or group to Sully Historic Site for hands-on fun learning designed to enrich understanding of Fairfax County circa 1800. The program from 10 a.m. to noon costs $10 for children; $5 for adult chaperones. For more information, call 703-437-1794.

Garden Tour and Tea
(Adult) Tour the glorious Green Spring demonstration gardens with a Master Gardener docent who will inspire you with stories of Green Spring Gardens’ past and present. Afterwards, enjoy a traditional English afternoon tea. The cost of the program from 1 to 3 p.m. is $32 per person. Reservations are required. For more information, call 703-941-7987.

Turtle Pool Party
(2-Adult) Turtles like to soak and take in the sun. Come by our Visitor Center deck at Riverbend Park to watch our turtles enjoy some outdoor time. Afterwards, go on a scavenger hunt and hike around the park. The program from 4 to 5 p.m. is free! For more, call 703-759-9018.

Historic Desserts
(7-Adult) Everyone loves desserts, but have you ever wondered how they were made 160 years ago? Join a historian at Ellanor C. Lawrence Park and learn about the Machens who lived at Walney in the 19th century and how they might have made dessert. Try making raspberry dumplings with homemade ice cream. The program from 7 to 8:30 p.m. costs $10 per person. Children must be accompanied by a registered adult. For more information, call 703-631-0013.

Riverside Campfire - American Indians
(2-Adult) Play American Indian games and listen to stories ‘round the campfire at Riverbend Park. S’mores are provided. Come early if you want to bring a picnic or toast hotdogs. Bring a toasting stick, blanket and flashlight. The program from 6 to 7:30 p.m. costs $8 per person. For more information, call 703-759-9018.

Summer Astronomy Campfire
(4-Adult) Enjoy a campfire at Hidden Oaks Nature Center and learn what ancient cultures saw in the stars. Look through a telescope at the moon and learn to identify the visible constellations. Make s’mores. The one-hour program begins at 8:15 p.m. and costs $6 per person. Children must be accompanied by an adult registered in the program. This event will be canceled if it rains. The minimum age to attend is four years old. For more information, call 703-941-1065.

Campfire Fridays Summer
(3-Adult) Come along for a night of campfire, s’mores, animals and more. Each summer evening campfire at Hidden Pond Nature Center will feature a different topic and different areas of the park will be visited. The program from 7:30 to 9 p.m. costs $8 per person. Call 703-451-9588.

Campfire Saturdays: Stargazing
(3-Adult) Enjoy a stroll along the shore at Burke Lake Park and learn about the constellations and other night-sky features. Our astronomical naturalist identifies the stars for you and lets you try out a telescope. The program concludes with a campfire. S’mores ingredients are provided; hot dogs are welcome. The program from 8 to 9 p.m. costs $8 per person. Children must be accompanied by a registered adult. Call 703-323-6600.

Workshop: Casting Leaves in Concrete
(Adults) Capture the beauty of ornamental leaves by casting them in concrete to decorate your home or garden. Staff from Green Spring Gardens will demonstrate casting and painting techniques and assist participants in making a creation to take home. The two-hour workshop begins at 9:30 a.m. and costs $40 per person, plus a $25 supply fee. Please register for both the workshop and supply fee. Call 703-642-5173.

Sketch Hike: Historic Huntley
(11-Adult) Join park naturalist and artist Margaret Wohler for a hike through history at Huntley Meadows Park. Meet at the Norma Hoffman Visitor Center and hike up to Historic Huntley for some breathtaking views while sketching some of the Mason family villa’s historic architecture and landscaping. The program from 10 a.m. to noon costs $8 per person. Call 703-768-2525.

Ice Cream at Historic Huntley
(2-Adult) Make and enjoy hand-cranked ice cream as Huntley's Harris family may have done. Discover how the histories of ice cream and Historic Huntley follow a similar path from elite luxury to family fare. A tour of the ice well and Historic Huntley House are included in the $8 per person cost. This event runs from 1 to 2 p.m. For more information, call 703-768-2525.

Lizard Survey
(8-Adult) Come to Ellanor C. Lawrence Park and watch a short movie on our native lizards, then see our lizards up close. Join a naturalist on a short hike to find these elusive reptiles. Meet at Cabell’s Mill at 5:30 p.m. for this one-hour program. The cost is $5 per person. Children must be accompanied by an adult registered in the program. For more, call 703-631-0013.

Dairy Farming at Walney: Ice Cream
(4-Adult) Explore Walney’s dairy farm history while touring the ice house and dairy at Ellanor C. Lawrence Park. Try your hand at ice-making tools and picking up an ice block. We’ll be making and eating hand-cranked ice cream. The program from 2 to 3:30 p.m. costs $8 per person. Children must be accompanied by an adult registered in the program. For more information about the Diary Farming program, call 703-631-0013.

40th Anniversary
(All ages) Come enjoy a very special Grinding Day as Colvin Run Mill celebrates its 40th year on the National Register of Historic Places. Maintained by the National Park Service, The National Register of Historic Places is the official list of the nation’s historic places worthy of preservation, and Colvin Run Mill has been on it since 1977. See how flour and corn meal used to be made. This grinding event runs from noon to 3 p.m., and it is free! For more information about grinding demonstrations, call 703-759-2771.

Grinding Demonstrations
(All ages) See and hear 19th century technology at work at Colvin Run Mill. The miller will be grinding, conditions permitting, from noon to 3 p.m. Please call the site to confirm. The tour costs $7 for adults, $6 for students 16 and up with ID, and $5 for children and seniors. No reservations are required. For more, call 703-759-2771.

The People’s Princess
(Adult) Twenty years after her death, the story of Diana, Princess of Wales still captivates the world. Look back at her intensely public and turbulent life and its impact on the British monarchy as we remember the many faces of Diana: fairytale princess, style icon, humanitarian and mother. This program from 1 to 3 p.m. at Historic Green Spring includes a traditional English tea. The cost is $32 for the program and tea; $12 for the program only. For more information about this and other teas at Green Spring Gardens, call 703-941-7987.

Little Hands on the Farm
(2-5 yrs.) Join us in the Kidwell Barn at Frying Pan Farm Park to meet a farm animal, enjoy a story, craft or game, and pretend to be the famer with fun chores. This is a program your child will remember! Sessions for children age two to three run from 9:45 to 10:30 a.m. Sessions for children age three to five run from 11 to 11:45 a.m. The cost is $8 per child. Pre-paid reservations are required. An adult must attend the class with the child. For more information, call 703-437-9101.

Nature for Tiny Tots
(24-42 months) Children and parents learn together about plants and animals and their habitats through songs, crafts, and activities in this nature program at Huntley Meadows Park. Class meets from 10 to 11 a.m., and the cost is $12 per child. Topics vary each class. For more information, call 703-768-2525.

Water Critters
(2-6 yrs.) Explore the wet world of otters, crabs, turtles, frogs and fish through songs, story and a visit to a pond. Meet live turtles and frogs. This 45-minute program at Hidden Oaks Nature Center begins at 1 p.m. on August 8 and at 10 a.m. on August 22. The cost is $6 per child. Children must be accompanied by an adult. For more information, call 703-941-1065.

Useful & Edible Native Plants and Trees
(12-Adult) Come to Burke Lake Park from 9 to 11 a.m. to learn about native plants and trees in the wilderness (or your own backyard) that offer food and so much more. Find out which plants are safe to eat and those to avoid. Learn the right weeds and trees to help start a fire, get a drink, find a meal, make a rope, stop an itch or heal a wound. Explore with us the trails, fields and forests of Burke Lake Park and see what Mother Nature is growing just for you. Bring water, snack, rainwear, and wear suitable outdoor clothes and hiking boots/shoes. The cost is $23 per person, and the program runs rain or shine. For more information, call 703-323-6600.

Family Trivia Tuesdays: Summer
(5-Adult) Test your knowledge about cultural and natural history. Join us at Ellanor C. Lawrence Park for family-friendly fun as we compete at Cabell’s Mill to see who will be the park trivia champion. The subject will be the 20th century. Trivia time is 7 to 8:30 p.m. Register individually for $7 or in groups of four for $22. For more information, call 703-631-0013.

Nature for Tiny Tots
(24-42 months) Children and parents learn together about plants and animals and their habitats through songs, crafts, and activities in this nature program at Huntley Meadows Park. Class meets from 10 to 11 a.m., and the cost is $12 per child. Topics vary each class. For more information, call 703-768-2525.

Nature for Tiny Tots
(24-42 months) Children and parents learn together about plants and animals and their habitats through songs, crafts, and activities in this nature program at Huntley Meadows Park. Class meets from 10 to 11 a.m., and the cost is $12 per child. Topics vary each class. For more information, call 703-768-2525.

Flora Fauna-Summer Series
(3-6 yrs.) Join Hidden Pond Naturalists for a summer of exploration with a different topic each week. Come for one or sign up for all. The series meets from 11 to 11:45 a.m., and the cost is $5 per child for each session. Children must be accompanied by an adult. Call 703-451-9588.

Snake Feeding program
(7-Adult) Join us at Hidden Pond Nature Center for a behind-the-scenes look at the snakes at Hidden Pond. Visitors will observe the unique methods snakes use to feed. Get a glimpse of something few people get to see in the wild while learning about our local serpents and their importance to our ecosystem. Please take into consideration this program is not for everyone and may be graphic. The program runs from 5:15 to 6 p.m. and costs $5 per person. For more information, call 703-451-9588.

Amphibians After Dark
(7-Adult) Assist naturalists with a survey of amphibians by their calls from 8 to 9 p.m. at Burke Lake Park. Learn how to identify frogs and toads by their calls as we explore pools and ponds. The cost is $6 per person. Children must be accompanied by an adult registered in the program. For more information, call 703-323-6600.

Riverside Campfire - Explore Bats and Bugs
(2-Adult) This program is great for those who love bats and bugs. As day turns to night, bats and some insects wake up. Through games and activities at Riverbend Park, learn about the relationship between night-flying bats and the insects they seek. Bring a toasting stick; s’mores are provided. The campfire program runs from 6 to 7:30 p.m. and costs $8 per person. Come early if you’d like to bring a picnic or hot dogs to toast. This event will be canceled if it rains. Please call 703-759-9018 for more information.

Turtle Pool Party
(2-Adult) Turtles like to soak and take in the sun. Come by our Visitor Center deck at Riverbend Park to watch our turtles enjoy some outdoor time. Afterwards, go on a scavenger hunt and hike around the park. The program from 4 to 5 p.m. is free! For more, call 703-759-9018.

Twilight Hilltop Tour
(Adults) Historic Huntley sits high upon a hill overlooking Hybla Valley and Huntley Meadows Park. It’s a dramatic setting made all the more stunning by the setting sun. Join us for a special tour and see the house in a different light. Light refreshments will be served afterward. The program from 7:30 to 8:30 p.m. costs $5 per person. For more information, call 703-768-2525.

31st Annual Begonia Show & Sale
(All ages) Feast your eyes on this show at Green Spring Gardens sponsored by the Potomac branch of the American Begonia Society. Be tempted with splashes of color and shape that last long after frosts have put our outdoor gardens to bed. The sale from 9 a.m. to 4:30 p.m. on Saturday and noon to 3:30 p.m. on Sunday offers a wide variety of begonias, including subtropical species. This event is free. Call 703-642-5173.

Workshop: Garden Terrarium
(16-Adult) Enjoy the outdoors by creating a beautiful, tabletop terrarium at Green Spring Gardens. Begonia enthusiast Johanna Zinn provides valuable information on this versatile genus and teaches you techniques for creating the perfect terrarium from 1 to 2:30 p.m. A container, plants, soil and care instructions will be provided. The cost is $38 per person, plus a $25 supply fee. Register for both the program and supply fee. For information, please call 703-642-5173.

Meadow Bug Hunt
(2-Adult) We’re going on a bug hunt and we’re not scared. The meadow at Ellanor C. Lawrence Park is a-buzz with life. Come capture and release amazing insects and other arthropods. Learn the secret of this special meadow habitat from 5:30 to 6:30 p.m. The cost is $5 per person. Insect jars and nets will be provided. Wear long pants and closed shoes; insect repellent is optional. Bring a field guide if you have one. Children must be accompanied by an adult registered in the program. For more, call 703-631-0013.

Evening Walk
(Adults) Join naturalist P.J. Dunn to hike the trails after dark at Huntley Meadows Park as you look and listen for owls, beavers and other night animals. The walk from 8 to 10 p.m. costs $8 per person. For more information, call 703-768-2525.

Wagon Ride-Birds, Butterflies & Blossoms
(2-Adult) Take a wagon ride scavenger hunt through the meadow at Riverbend Park from 10 to 11 a.m. Search for birds and butterflies and meet a friendly animal up close. The cost is $7 per person. Children must be accompanied by an adult registered in the program. For more information, call 703-759-9018.

31st Annual Begonia Show & Sale
(All ages) Feast your eyes on this show at Green Spring Gardens sponsored by the Potomac branch of the American Begonia Society. Be tempted with splashes of color and shape that last long after frosts have put our outdoor gardens to bed. The sale from 9 a.m. to 4:30 p.m. on Saturday and noon to 3:30 p.m. on Sunday offers a wide variety of begonias, including subtropical species. This event is free. Call 703-642-5173.

Rain Forest Puppet Show
(3-7 yrs.) Explore the magical rain forest through a puppet show at Hidden Oaks Nature Center starring a trio of lizards and their friends. Enjoy rain forest activities such as bird watching, puddle jumping and a chameleon craft. The program from 1:30 to 2:30 p.m. costs $7 per child. Children must be accompanied by an adult. For more information, call 703-941-1065.

Powhatan’s People
(2-Adult) Discover some elements of the Algonquian culture of the Powhatan and Tauxenent Indians such as crafting stone tools, hunting and farming. End the day playing games. This program at Historic Huntley from 2 to 3:30 p.m. costs $7 per person. Call 703-768-2525 for information.

Intro to Telescopes
(10-Adult) Come to Observatory Park at Turner Farm to learn astronomy basics as well as how to set up and use your telescope. The course content depends on telescope type and includes observing selected objects in the sky using the roll-top observatory, if weather permits. You can bring your own telescope. The class from 7:30 to 8:30 p.m. costs $8 per person. For more information, call 703-324-8618.

Watercolor Workshop: Working with Brusho
(16-Adult) Learn to use Brusho, a watercolor medium made with ink crystals, in your watercolor paintings on various surfaces under the guidance of artist Marni Maree. Bring your lunch to this class being held at Green Spring Gardens from 9:30 a.m. to 3:30 p.m. A supply list will be emailed. The cost is $88 per person. For more information, call 703-642-5173.

Evening Stroll
(6-Adult) A naturalist takes you on a relaxing stroll through Huntley Meadows Park at dusk to tour the woods and wetlands to watch and listen for beavers, owls and other nocturnal residents. The stroll from 8 to 10 p.m. costs $8 per person. Children must be accompanied by an adult registered in the program. For more information, call 703-768-2525.

Grinding Demonstrations
See and hear 19th century technology at work at Colvin Run Mill. The miller will be grinding, conditions permitting, from noon to 3 p.m. Please call the site to confirm. The tour costs $7 for adults, $6 for students 16 and up with ID, and $5 for children and seniors. No reservations are required. For more information, call 703-759-2771.

Blacksmithing Demonstrations
Watch as the blacksmith fires up his forge at Colvin Run Mill and works with hammer and tongs to make iron tools and utensils. No reservations are required for this free demonstration from 11 a.m. to 3 p.m. For information, call 703-759-2771.

Wagon Ride-Journey to the Potomac River
(2-Adult) Enjoy riding through the woods and along the Potomac River from 10 to 11 a.m. while finding out about Riverbend Park’s wildlife and the American Indians who once lived here. The cost is $7 per person. Children must be accompanied by an adult registered in the program. For more information, call 703-759-9018.

Oh Say Can You See: Fun Facts, Games and Trivia for the 4th
Challenge the old gray cells with political trivia, games and fun facts at Sully Historic Site. What does the Declaration of Independence actually say? Who were the signers participating in this act of treason? Do you dare to use a quill pen and add your signature? You and your family will be surprised by what you may discover about the past and how it has shaped our lives today and for the future. The program is included with the house tour. The cost is $7 for adults, $6 for students, and $5 for seniors and children. For more, call 703-437-1794.

Garden Sprouts: Nature Playgroup
(2-5 yrs.) Your preschooler enjoys nature-themed toys and puzzles while you meet other playgroup parents from 10 to 11:30 a.m. at Green Spring Gardens. A staff member is on hand to put out nature sensory bins, direct games and activities, or lead a garden walk. The topic will be trees. The cost is $6 per child. For more information, call 703-642-5173.

Walk, Waddle and Wiggle
(2-5 yrs.) Animals move in fascinating ways. Walk, waddle or wiggle on over to Hidden Oaks Nature Center to enjoy activities and try out some animal locomotion. The program from 9:45 to 10:30 a.m. costs $6 per child. Children must be accompanied by an adult. For more information, call 703-941-1065.

Toddler Time - Terrific Turtles
(2-4 yrs.) Explore nature through outdoor activities and meet one of our turtles at Hidden Oaks Nature Center from 9:45 to 10:30 a.m. The cost is $6 per child. Children must be accompanied by an adult. For more, call 703-941-1065.

Flora Fauna-Summer Series
(3-6 yrs.) Join Hidden Pond Naturalists for a summer of exploration with a different topic each week. Come for one or all. The series meets from 11 to 11:45 a.m., and the cost is $5 per child for each session. Children must be accompanied by an adult. For more, call 703-451-9588.

19th Century School Days
(5-12 yrs.) Come to Sully Historic Site and cypher on slate boards, write with quill pens and read stories in an 1820s school house. The one-hour programs begin at 1, 2 and 3 p.m. The cost is $5 per child. Children must be accompanied by an adult. For more information, call 703-437-1794.

Turtle Pool Party
(2-Adult) Turtles like to soak and take in the sun. Come to the Visitor Center deck at Riverbend Park to watch our turtles enjoy some outdoor time. Afterwards, go on a scavenger hunt and hike around the park. The program from 4 to 5 p.m. is free! For more, call 703-759-9018.

Creek Adventure Wagon Ride
(2-Adult) Take a wagon ride at Ellanor C. Lawrence Park and bring shoes that can get wet. The trip from 7 to 8 p.m. costs $6 per person. Children must be accompanied by a registered adult. For more information, call 703-631-0013.

Animal Pajama Party
(3-7 yrs.) Wear your pajamas to Hidden Oaks Nature Center to hear bedtime stories, meet animals and wish goodnight to the center’s live animals. The party from 7 to 7:45 p.m. is $6 per child. Children must be accompanied by an adult. For more information, call 703-941-1065.

Twilight Hilltop Tour
(Adults) Enjoy the stunning view from Historic Huntley as the sun sets and join us after hours for a special tour. Light refreshments will be served. The program runs from 8 to 9 p.m. It costs $5 per person. For more information, call 703-768-2525.

Painting Flowers with Paper Workshop
(16-Adult) Learn to create a beautiful flower painting using commercial and hand-painted papers in this series at Green Spring Gardens from 1 to 4 p.m. Beginners welcome. The cost is $119 per person for four classes. Call 703-642-5173.

Pond Life
(2-Adult) Meet a naturalist by Walney Pond at Ellanor C. Lawrence Park and search for catch-and-release tadpoles, dragonfly nymphs, water scorpions and more from 5:30 to 6:30 p.m. The cost is $5 each. Children must come with a registered adult. For more, call 703-631-0013.

Down by the Sea Floral Design Workshop
(Adult) Create a summer centerpiece with fresh flowers, seashells and a sand pail at Green Spring Gardens. The workshop from 9:30 to 11 a.m. costs $38, plus a $25 supply fee. Register for both. For more, call 703-642-5173.

Summer Plants that Sizzle, Not Fizzle
(Adults) Join Green Spring Gardens’ curatorial horticulturist Brenda Skarphol for a stroll through our gardens to learn about beautiful hardy plants that thrive in the summer heat. Get design and maintenance ideas for eco-friendly gardening. The program from 10 to 11:30 a.m. costs $18 per person. For more information, call 703-642-5173.

Wagon Ride-Birds, Butterflies & Blossoms
(2-Adult) Take a wagon ride scavenger hunt through the meadow at Riverbend Park from 10 to 11 a.m. and meet a friendly animal up close. The cost is $7 per person. Call 703-759-9018.

Run of the Mill
(6-Adult) Visit historic Colvin Run Mill for a hands-on program on how we clean, mill and sift grains using antique equipment. Take home a souvenir sample. The session from 1 to 3 p.m. costs $20 per person. Call 703-759-2771.

Fashion Diplomacy Tea Program
(Adults) Come to Historic Green Spring and discover fashion’s historical role in international diplomacy. A traditional English tea follows the program. This event from 1 to 3 p.m. costs $32 for the program and tea; $12 for the program only. Reservations required. Call 703-941-7987.

Turtle Survey
(2-Adult) See turtles close up at Ellanor C. Lawrence Park from 5:30 to 6:30 p.m. Learn how to identify different species of turtle and then assist a naturalist in a search for them at the pond. The cost is $5 per person. Call 703-631-0013.

Teddy Bear Picnic
(3-7 yrs.) Today’s the day the teddy bears have their picnic at Hidden Oaks Nature Center. Bring your teddy bear to join our stories, songs, games and light refreshments. The picnic from 1:30 to 3 p.m. costs $10 per child. Children must be accompanied by an adult. Call 703-941-1065.

Pancakes at the Mill
(4-Adult) Make corn pancakes with honey while discovering the little-known history of the place we call now Cabell’s Mill at Ellanor C. Lawrence Park The program from 10 to 11 a.m. costs $8 per person. Children must be accompanied by a registered adult. For more, call 703-631-0013.

Junior 18-hole Tournament
(7-17 yrs.) Junior golfers compete in an 18-hole, individual stroke tournament at Burke Lake Golf Course from 8 a.m. to noon. The $20 cost per person includes lunch. Call 703-323-1641.

Dragons and Damsels at the Pond
(2-Adult) In the summer, dragonflies and damselflies dart above the surface of Walney Pond at Ellanor C. Lawrence Park. Learn myths and facts about these beautiful insects from 7 to 8 p.m. The cost is $5 per person. Call 703-631-0013.

Reptile Survey
(7-Adult) Assist a naturalist with a reptile survey at Lake Accotink Park from 8 to 9 p.m. Learn about the misunderstood water snake as we search for them and document their size, gender and location. The cost is $6 per person. Children must be accompanied by a registered adult. For more information, call 703-569-3464.

Reptile Survey
(7-Adult) Assist a naturalist with a reptile survey at Burke Lake Park from 8 to 9 p.m. Learn about the misunderstood water snake as we search for them and document their size, gender and location. The cost is $6 per person. Children must come with a registered adult. Call 703-323-6600.

Snake Feeding program
(7-Adult) Join us at Hidden Pond Nature Center to observe the unique methods snakes use to feed. Get a glimpse of something few people get to see in the wild. Please consider that this program may be graphic. It runs from 5:15 to 6 p.m. and costs $5 per person. Call 703-451-9588.

Nocturnal Hunters
(2-Adult) Join a naturalist at Ellanor C. Lawrence Park for a night hike to learn about the park’s nocturnal animals. Catch and release fireflies and locate bats with a bat detector. Roast marshmallows at the campfire. The program from 8 to 9 p.m. costs $6 per person. Children must come with a registered adult. Call 703-631-0013.

Riverside Campfire - Batty about Bats
(2-Adult) Learn more about bats and why they are disappearing from our skies through games and activities at Riverbend Park. Bring a toasting stick; s’mores are provided. The program from 6 to 7:30 p.m. costs $8 per person. Children must be accompanied by a registered adult. For more information, call 703-759-9018.

Native American Archery
(8-14 yrs.) Come to Hidden Pond Nature Center and learn how to make a bow and arrow, and then take aim and shoot. This program meets for three consecutive Saturdays from 10 to 11:30 a.m. and costs $30. Call 703-451-9588.

Made in the Shade Gardening
(Adults) Horticulturist Karen Rexrode introduces you to fabulous plants at Green Spring Gardens that will make your shady garden look great. The program from 10 to 11 a.m. costs $18 per person. For more information, call 703-642-5173.

Modified Stableford Tournament
(8-Adult) Participants at Jefferson District Golf Course will compete in a nine-hole, individual stroke-play tournament utilizing the Modified Stableford scoring system. Play at 1 p.m. The cost is $35 per person and includes lunch and prizes. The rain date is July 22. Call 703-573-0444.

Dinofest in Nature Playce
(3-8 yrs.) Come to Hidden Oaks Nature Center and explore dinoland. Unearth a real fossil to keep, compare your height to that of dinosaurs, and make a fossil impression to take home. This event from 1 to 2 p.m. will be canceled if it rains. The cost is $6 per child. Children must come with an adult. For more, call 703-941-1065.

Powhatan’s People
(2-Adult) Learn about elements of the Algonquian culture of the Powhatan and Tauxenent Indians, such as crafting stone tools, hunting and farming. End the day playing games. This program at Ellanor C. Lawrence Park runs from 2:30 to 4 p.m. The cost is $7 per person, and children must be accompanied by a registered adult .For more information, call 703-631-0013.

Garden Tour, Ice Cream Social and Exhibit
(Adult) Stroll the summer gardens at Green Spring Gardens with a Master Gardener docent, then cool down at an ice cream social in the 1784 Historic House. View a limited-time photo exhibit on the fascinating history of the house. This program from 10 to 11:30 a.m. costs $12 per person. For more information, call 703-941-7987.

Animal Search with a Naturalist
(12-Adult) Early morning is one of the most active times at Ellanor C. Lawrence Park. From 8 to 9 a.m., a naturalist will help you see which creatures, feathered or furred, are in the forest. The cost is $5 per person. Call 703-631-0013.

Grinding Demonstrations
See and hear 19th century technology at work at Colvin Run Mill. The miller will be grinding, conditions permitting, from noon to 3 p.m. Please call the site to confirm. The tour costs $7 for adults, $6 for students 16 and up with ID, and $5 for children and seniors. No reservations are required. For more information, call 703-759-2771.

Pond Life
(2-Adult) Meet a naturalist by Walney Pond at Ellanor C. Lawrence Park and search for catch-and-release tadpoles, dragonfly nymphs, water scorpions and more from 5:30 to 6:30 p.m. The cost is $5 each. Children must come with a registered adult. For more, call 703-631-0013.

Sundaes in the Park
(2-Adult) Bring the family for a Sunday stroll along the paths around Hidden Oaks Nature Center with a vanilla ice cream sundae. Sundaes are $2 each, and the woodland walk and visit to Nature Playce are free. The event runs 1 to 3 p.m. For more information, call 703-941-1065.

Federal Era Society  
(All Ages) Visit with members of the Federal Era-Regency Society of Maryland at Colvin Run Mill. Costumed historians will picnic and socialize with the public from 11 a.m. to 3 p.m. This event is free. A separate ticket is required for the grinding demonstration. Call 703-759-2771.

Planetarium Adventure
(5-Adult) Learn about the wonders of the solar system and the upcoming solar eclipse at a planetarium presentation at Falls Church High School from 1 to 3 p.m. Solar eclipse glasses will be provided to all attendees. The program cost is $10 per person. Children must be accompanied by a registered adult. Register through Hidden Oaks Nature Center. Call 703-941-1065.

Animal Feeding at the Nature Center
(3-Adult) It’s dinner time at Hidden Pond Nature Center and worms and insects are on the menu. Help our naturalist care for and feed the nature center’s animals from 4:30 to 5:30 p.m. The cost is $5 per person. Call 703-451-9588.

Meteor Astronomy
(10-Adult) This class at Observatory Park at Turner Farm covers meteor basics —what they are, best time to view, fireball reporting and more. An optional outdoor observing session will be held after class, weather permitting. Class meets from 7:30 to 8:30 p.m. and costs $8 per person. For more information, call 703-324-8618.

Bats
(7-Adult) Walk the meadows and forest edges at Ellanor C. Lawrence Park to learn about bats and see them feeding on insects. Use a bat detector to hear echolocation. The program from 8:30 to 9:30 p.m. costs $5 per person. Children must come with a registered adult. Call 703-631-0013.

Garden Tour and Tea
(Adult) Tour the glorious demonstration gardens with a Master Gardener at Green Spring Gardens and enjoy a traditional English afternoon tea. The program from 1 to 3 p.m. costs $32 per person. Reservations required. Call 703-941-7987.

Riverside Campfire - Night Wings
(2-Adult) Hoot like an owl, swoop like a bat and flutter like a moth as we learn about the creatures that fly through our night skies. This campfire program at Riverbend Park runs 6 to 7:30 p.m. and costs $8 per person. Bring a toasting stick; s’mores are provided. Call 703-759-9018.

Campfire Fridays Summer
(3-Adult) Come to Hidden Pond Nature Center for a night of campfire, s’mores, animals and more. The program from 7:30 to 9 p.m. costs $8 per person. For more, call 703-451-9588.

Campfire Saturdays: Stargazing
(3-Adult) Stroll the shore at Burke Lake Park, learn about the constellations and other night-sky features, and try out a telescope. End with a campfire and s’mores. The program from 8:30 to 9:30 p.m. costs $8 per person. For more information, call 703-323-6600.

Campfire Bats, Bugs, and Owls Oh My!
(4-Adult) Learn about critters that only come out at night and how they thrive while we sleep. Watch for bats at Hidden Oaks Nature Center, call for owls and roast marshmallows from 8:30 to 9:30 p.m. The cost is $6. Children must come with a registered adult. Call 703-941-1065.

Ancient Plants Sketch Hike
(13-Adult) At Huntley Meadows Park, see plants whose ancestors have been with us since dinosaur times! Learn to sketch ferns and moss on a two-hour sketch hike beginning at 10 a.m. The cost is $8 per person. Call 703-768-2525.

Bead Heaven
(13-Adult) Broaden your jewelry-making skills by crafting a beautiful, wire-wrap and bead necklace at Green Spring Gardens from 1 to 4 p.m. The cost of the program is $42 with a supply fee of $25 payable to the instructor. Call 703-941-7987.

Moonless Night
(3-Adult) Take advantage of a moonless night at Observatory Park at Turner Farm to learn about planets, constellations, galaxies and star clusters. The program from 8:30 to 9:30 p.m. costs $6 per person. Children must be accompanied by a registered adult. Call 703-324-8618.

Dairy Farming at Walney: Ice Cream
(4-Adult) Explore Walney’s dairy farm history while touring the ice house and dairy at Ellanor C. Lawrence Park. We’ll be making and eating hand-cranked ice cream from 2 to 3:30 p.m. The cost is $8 per person. Children must come with a registered adult. For more, call 703-631-0013.

Ice Cream at Historic Huntley
(2-Adult) Make and enjoy hand-cranked ice cream at Historic Huntley from 1 to 2 p.m. A tour of the ice well and house are included in this program. The cost is $8. Call 703-768-2525.

Lethal Predators
(8-Adult) Assist a naturalist with conservation biology at Ellanor C. Lawrence Park as we head out into the forest to look for some of our lethal predators. The program from 9 to 10:30 a.m. costs $7 per person. Call 703-631-0013.

Wagon Ride-Birds, Butterflies & Blossoms
(2-Adult) Take a wagon ride scavenger hunt through the meadow at Riverbend Park from 10 to 11 a.m. and meet a friendly animal up close. The cost is $7 per person. Call 703-759-9018.

Animals Underground
(2-5 yrs.) See what lives under the forest floor as we learn about moles, earthworms, termites and other creatures of the soil. This 45-minute program at Hidden Oaks Nature Center runs at 1 and 2:15 p.m. The cost is $6 per child. Children must come with an adult. Call 703-941-1065.

History for Small Fries
(1-5 yrs.) Bring your child to Sully Historic Site for a story and craft to discover how things were in the olden days. The program from 10 to 11 a.m. costs $6 per child. Call 703-437-1794.

Family Trivia Tuesdays: Summer
(5-Adult) Join us at Ellanor C. Lawrence Park for family-friendly fun as we compete at Cabell’s Mill to see who will be the park trivia champion. The topic from 7 to 8:30 p.m. is Reptiles and Amphibians. Register individually for $7 or in groups of four for $22. For more, call 703-631-0013.

Intro to Telescopes
(10-Adult) Come to Observatory Park at Turner Farm to learn astronomy basics as well as how to set up and use your telescope. You can bring your own telescope. The class from 8 to 9 p.m. costs $8 per person. Call 703-324-8618.

Fireflies in the Meadow
(2-Adult) See fireflies light up the meadow at Ellanor C. Lawrence Park from 8:30 to 9:30 p.m. Bring a plastic jar with a lid to catch and then release. The cost is $5 per person. Meet at Cabell’s Mill. For more, call 703-631-0013.

Reptile Campfire
(2-Adult) Join a naturalist at Ellanor C. Lawrence Park for a hike to learn about nocturnal reptiles and make s’mores at the campfire. The program from 7 to 8:30 p.m. costs $8 for children and adults. For more, call 703-631-0013.

Riverside Campfire - Reptiles
(2-Adult) Meet some of the fantastic reptiles of Riverbend Park and play reptilian games from 6 to 7:30 p.m. Bring a toasting stick and flashlight. The cost is $8 per person. Call 703-759-9018.

Goodnight Walk: Night Sky
(3-Adult) Take a stroll at Hidden Oaks Nature Center to learn about night-sky wonders and enjoy a story and craft. Bring a flashlight and dress for an outdoor walk. The program from 8 to 9 p.m. costs $6 per person. Children must come with a registered adult. Call 703-941-1065.

Campfire & Night Senses
(6-Adult) Participate in activities at Lake Fairfax Park that show how the night affects our senses and how animals adapt to the dark. The program from 8:30 to 10 p.m. costs $8 per person. For more information, call 703-471-5414.

Evening Walk
(Adults) Join naturalist P.J. Dunn to hike the trails after dark at Huntley Meadows Park as you look and listen for owls, beavers and other night animals. The walk from 8 to 10 p.m. costs $8 per person. For more information, call 703-768-2525.

Blacksmithing Demonstrations
Watch as the blacksmith fires up his forge at Colvin Run Mill and works with hammer and tongs to make iron tools and utensils. No reservations are required for this free demonstration from 11 a.m. to 3 p.m. For information, call 703-759-2771.

Wagon Ride-Birds, Butterflies & Blossoms
(2-Adult) Take a wagon ride scavenger hunt through the meadow at Riverbend Park from 10 to 11 a.m. and meet a friendly animal up close. The cost is $7 per person. Call 703-759-9018.

Run of the Mill
(6-Adult) Visit historic Colvin Run Mill for a hands-on program on how we clean, mill and sift grains using antique equipment. Take home a souvenir sample. The session from 1 to 3 p.m. costs $20 per person. Call 703-759-2771.

How to Draw Your Dragon(fly)
(12-Adult) Join naturalist/artist Margaret Wohler (illustrator for Huntley’s own Dragonfly Guide) to learn tips and techniques for drawing dragonflies and other insects you might find in Huntley Meadows Park. The program from 1 to 3 p.m. costs $8 per person. For more, call 703-768-2525.

Tree Trek
(10-Adult) Join an expert naturalist at Ellanor C. Lawrence Park on a search for the biggest, oldest, rarest and most important trees in our forest. Discover what makes a forest habitat home and how parks care for them. The program from 5:30 to 6:30 p.m. costs $6 per person. It may fulfill some scouting requirements. For more information, call 703-631-0013.