• Aerial view of the George Washington Memorial Parkway in the fall

    George Washington

    Memorial Parkway DC, MD, VA

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  • Lane Closures for Bridge Inspections

    Workers will close lanes of the George Washington Memorial Parkway while they inspect the Theodore Roosevelt Bridge on October 20 and the Metro bridge near I-395 on October 23. All lanes will be open during morning and afternoon rush hours. More »

  • Multiple Closures during Marathon on Sunday, October 26th

    Please visit the "Closures & Construction" page for more detailed information and for a list of alternate routes for the G.W. Parkway northbound from Rt. 50 to Rt. 123. More »

Biodiversity Discovery

Discover the amazing array of plants and animals that thrive in two very different ecosystems in the park. These family-friendly, free activities will showcase biodiversity at Dyke Marsh Wildlife Preserve and Great Falls Park.

Check the schedule of events for dates, times, and locations.

Ranger hat with bird guide and binnoculars

Biodiversity Discovery Club
Explore a different group of plants or animals each week during these gatherings. A ranger will help you use scientific tools to discover dragonflies, aquatic plants, frogs, wildflowers, bugs, lichen, snakes, fungi, and more.

Homemade near-infrared camera

Biodiversity Discovery Mini-camp
A ranger will help you develop the skills of a naturalist and introduce you to handy tools--new and old. Over the course of two days you will learn how to observe local wildlife and how to share your observations with a community of citizen scientists. Call 703-289-2552 to register for this program.

Person taking a picture of a spider

Picturing Biological Diversity
Bring your digital camera or cell phone and smile for a selfie with your favorite species. After this one-hour walk you will be ready to use what you learned to discover and record wildlife during your next visit to the park.

Illustration of a cricket

Cricket Crawl
Crickets and katydids are a familiar soundtrack to summer nights. A ranger will lead you on a walk to listen for and identify eight of Great Falls Park's many species. This program is excellent preparation for the DC/Baltimore Cricket Crawl, a citizen science event happening in your own backyard or neighborhood on August 22.

Smerinthus geminatus moth

Mothing Night
Celebrate National Moth Week with a ranger-led walk in the dark at Great Falls Park. We will use a blacklight to explore the wild array of moth sizes, shapes, and colors.

Illustration of an Eagle Owl

Sounds of Summer Nights
Listen to the nighttime calls of insects, owls, coyotes, and more. Then sing along with a few chirps, hoots, and howls of your own. A ranger will guide you on walk through Great Falls Park and help you identify some of the animals that are most active after dark.

Did You Know?

Copperhead snake

Copperheads are venomous and are found in Turkey Run Park. If you see any snake on the trail, never attempt to pick up or disturb it.