How long is the extension of the blue ridge mountain range that Nichol's Gap Road was built over?
South Mountain (Maryland and Pennsylvania) South Mountain is the northern extension of the Blue Ridge Mountain range in Maryland and Pennsylvania. From the Potomac River near Knoxville, Maryland, in the south, to Dillsburg, Pennsylvania, in the north, the 70 mi range separates the Hagerstown and Cumberland valleys from the Piedmont regions of the two states. The Appalachian National Scenic Trail follows the crest of the mountain through Maryland and a portion of Pennsylvania.
Great Eastern Trail The Great Eastern Trail is a north-south hiking route that runs roughly 1600 mi through the Appalachian Mountains west of the Appalachian Trail in the eastern United States. It is still under development as of 2016. From south to north, it runs from Flagg Mountain through Alabama, Georgia, Tennessee, Kentucky, West Virginia, Virginia, Maryland and Pennsylvania, ending in western New York state. A connection from Flagg Mountain south to the Florida-Georgia border is considered "Phase II Development".