It protects the National Colonial Farm, Marshall Hall, and the Accokeek Creek Site.

The park is home to bald eagles, beavers, osprey, and other wildlife[2] and encompasses areas of wetland, meadow and woodland.

The Fergusons bought more property and encouraged friends to settle nearby, where they could protect the environment.

The foundation made arrangements to donate property to the National Park Service for parkland, a transaction completed in the 1960s.

[4] This both protected the environment, as well as the historic viewshed as seen from the Mount Vernon mansion, keeping the parkland as it was in George Washington's day, and preventing modern development along the shore of the river.