Potomac River Guide Home

Interactive Maps

The Lower Potomac

The Potomac Estuary

Mount Vernon to Reagan Airport

Mall Area

Georgetown to Great Falls

Potomac Piedmont

Upper Potomac

The North Branch

Boat Ramps

Monitoring Sites

Bridges and Ferries

Cruises and Charters

Search Potomac Sites

Dyke March

National Park Service Unit

Before Washington was a city, much of the upper estuary riverbank was a wetland. Dyke Marsh is a 380-acre relic of the way the Potomac was 200 years ago, with native aquatic plants and animals. It is a popular spot for waterfowl and migrating birds as well. More than 250 species of birds have been sighted in the wetland. The marsh is a part of the George Washington Memorial Parkway, from the Belle Haven picnic area southward to Wellington Villa. The marsh is visible from the parkway at the Hunting Creek Bridge. The Mount Vernon multi use trail leaves the roadside and goes directly through the marsh, with a dramatic series of wooden bridges over the wetlands. Dyke Marsh is part of the "Find Your Chesapeake" project of the National Park Service and the Chesapeake Conservancy. Click here for details.

Click here for larger map and nearby sites.

Contact Information
National Park Service
Turkey Run Park
McLean VA 22101

Website