The Allegheny Parkway was a proposed 632-mile (1,017 km) scenic highway, intended to extend from Harpers Ferry, West Virginia, to the Cumberland Gap, to be managed by the National Park Service.
It was seen as a complementary project to the Skyline Drive and Blue Ridge Parkway on the east side of the Shenandoah Valley.
The parkway was planned to start at Harpers Ferry, running northwest near the west bank of the Potomac River through Shepherdstown and Falling Waters before entering the Allegheny range at Hedgesville.
From Keyser the route turned south to follow the Allegheny Front, passing Blackwater Falls and Canaan Valley.
Farther south, the parkway was to pass near Seneca Rocks, Spruce Knob, the Sinks of Gandy, Droop Mountain Battlefield, White Sulphur Springs, Bluestone Lake in the New River valley and Breaks Interstate Park before ending at Cumberland Gap National Historical Park.