Description
The Potomac River flows through the gorge and extends SE from Great Falls to the S tip of Bear Island, 20.8 km (13 mi) NW of the center of Washington, DC, in George Washington Memorial Parkway. (US-T121)
History
Named for Stephen Tyng Mather (1867-1930), first Director of the National Park Service (NPS) and advocate of the planned development of the District of Columbia. (US-T121)