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.
North Fork Mountain North Fork Mountain is a quartzite-capped mountain ridge in the Ridge and Valley physiographic province of the Allegheny Mountains (or "High Alleghenies" or "Potomac Highlands") of eastern West Virginia, USA. Kile Knob, at 4,588 feet (1,398 m), is the mountain's highest point, and Panther Knob and Pike Knob are nearly as high.