The Dyke Marsh Nature Preserve is managed by the National Park Service as a part of the George Washington Memorial Parkway. Dyke Marsh is located along the west bank of the Potomac River and includes approximately 485 acres of tidal marsh, floodplain, and swamp forest. Dyke Marsh is one of the largest remaining freshwater tidal wetlands in the Washington Metropolitan area. Today, the nature preserve 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.