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Managed by the National Park Service as a part of the George Washington Memorial Parkway, Dyke Marsh provides a habitat or home for a diverse array of plants and animals and offers an ideal setting for a variety of recreational activities. The trail, which leads visitors into the marsh, known as the “Haul Road,” is a favorite of area birdwatchers, hikers, photographers, and nature lovers. In addition, the waters in and around the marsh are popular fishing areas. People who explore the marsh by canoe may be rewarded with up-close encounters with the resident wildlife.
Open year round, 6:00am-10:00pm
(Note: Many places fill to capacity on busy, nice weather days, especially holiday weekends. Please call ahead or visit the official website to get the most up-to-date information before visiting.)
Explore the Haul Road Trail, discover the marsh by boat, join expert birders on a bird walk on the trails (Friends of Dyke Marsh lead bird walks each Sunday. Walks leave from the entrance to the Haul Road Trail at 8 am.), and join in on various events throughout the year.
To request a ranger program at Dyke Marsh Wildlife Preserve call 703‑235-1530.
Restrooms, water fountains, and trash cans are located on the Mount Vernon Trail between the two large parking lots in Belle Haven Park. There are also restrooms, water fountains, and trash cans near the marina boat ramp.
Dyke Marsh was indeed "diked" at one time. In the early 1800s, earthen walls were built around the perimeter of the marsh in order to create more "fast land" or land not inundated by the high tides. These areas were used to graze livestock or grow crops.