Theodore Roosevelt Island Tidal Marsh

View the marsh from the established trail and boardwalk; do not step into vegetation or tidal mud.

The free lot has more than 100 marked standard and accessible spaces but regularly fills on pleasant weekends. Parking outside marked spaces is prohibited.

Free during island hours. High tide, rain, flooding, insects, and slick boards can make the route impassable; pets must stay leashed.

No facilities are in the marsh. Use the comfort station before entering the loop.

Island access and parking are free.

The footbridge is firm and wide, but island trails are gravel, dirt, roots, and boardwalk. Memorial Plaza is about a quarter-mile uphill, with grades up to roughly 12 percent and ramp access at the plaza.

Leashed dogs are allowed on trails but not on ranger-led programs. Use a leash no longer than six feet, carry waste out, and keep pets away from wildlife and marsh water.

The short bridge and memorial can work for families, while the full swamp loop adds roots, mud, water edges, and an unrailed boardwalk. Choose the route based on conditions.

Free during island hours. High tide, rain, flooding, insects, and slick boards can make the route impassable; pets must stay leashed.

The island has no direct Metro entrance. Rosslyn is the practical nearby station, followed by a walk and regional trail connection; verify construction and crossing conditions.