As of mid-2008, 20 trails and trail corridors are recognized as segments of the Potomac Heritage National Scenic Trail:

•         the 70-mile Laurel Highlands Hiking Trail, within Laurel Ridge State Park;

•         the 150-mile Great Allegheny Passage (connecting Cumberland, Md., and Pittsburgh, Penn.), a system of seven trails managed by an alliance of organizations and agencies;

•         the 184.5-mile Chesapeake and Ohio Canal Towpath within Chesapeake and Ohio National Historical Park;

•         two partially-completed routes within the District of Columbia—the 23-mile Fort Circle Parks Trail and a multi-use route between Georgetown and Oxon Cove Park;

•         the 18-mile Mount Vernon Trail and the 10-mile Potomac Heritage Trail within George Washington Memorial Parkway;

•         a 27-mile Potomac Heritage Trail On-Road Bicycling Route in Prince Georges County, Md.;

•         a one-mile trail along the north shore of Piscataway Creek in  Piscataway Park;

•         a two-mile route within Nanjemoy Natural Resource Management Area, Charles County, Md.;

•         a 4.5-mile route in Prince William Forest Park and a partially-completed 8-mile route, between Leesylvania State Park and Belmont Bay, in Prince William County;

•         7.7 miles of trails within Riverbend Park, Great Falls Park and Scott’s Run Nature Preserve in northern Fairfax County, Vir.;

•         a 15-mile linear park system in Loudoun County, Vir.;

•         the 23-mile Alexandria Heritage Trail in Alexandria, Vir.; and

•         the Government Island Trail, the planned Historic Falmouth-Ferry Farm Trail, and the Aquia Creek Water Trail in Stafford County, Vir.

Other trails—proposed segments of the National Scenic Trail—contribute to the concept, including:

•         the Potomac River Water Trail, a National Recreation Trail;

•         bicycling routes on the Northern Neck (Virginia) and in southern Maryland; and

•        Potomac Heritage Trail projects in the Northern Virginia.