
Also:
Sierra Club
Sat: Seneca Creek State Park, Greenway Trail (8.8 mi)
Potomac Appalachian Trail Club
Many cabin and trail crew work trips.
Tue: AT/Rose River/Big Meadows (17 mi)
Center Hiking Club
Sat: Great Falls (8 mi)
Sun: Hazel Mtn/White Rocks/Swiming hole (10 mi)
Capital Hiking Club
Wed: Woodley Park to U St. (4.5 mi)
Fri: Moonlight hike, C&O Canal (4 mi)
Sat: Harper's Ferry river tubing
Northern Virginia Hiking Club
Sat: Western Maryland Rail Bike Trail (42 mi)
Wanderbirds
Sun: Elkwallow Circuit via Piney Branch and Piney Ridge (5-11 mi)
Potomac Conservancy
Sun: Dragonfly and Damselfly Walk on the C&O Canal, followed by a barbershop quartet
FOR KIDS
Rock Creek Park
various planetarium programs
Fri: Creature Feature (all ages)
Sat: Habitat Hunt -- look for animal signs (ages 6-12)
Sun: Ranger-led horseback tour (ages 12+)
Sun: American Indian Games, Native People of the Rock Creek Valley (ages 7+)
Museum of Natural History
Daily feedings in the insect zoo and museum tours.
Tue: Hands-on activities in the Dig It! soil exhibit
Wed: Look at specimens or artifacts with a scientist in the Ocean Hall