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.
Tunxis Trail The Tunxis Trail is a 79 mi "Blue-Blazed" hiking trail "system" that traverses the western ridge of the central Connecticut valley. The mainline (official "Blue" and "non-dot") trail is not completely contiguous, notably there are two gaps of several miles (between the Southington and Burlington sections and between the Burlington section and the Nepaug section).