What stretches about 1200 miles and borders the Blue Ridge Mountains?
Great Appalachian Valley The Great Valley, also called the Great Appalachian Valley or Great Valley Region, is one of the major landform features of eastern North America. It is a gigantic trough—a chain of valley lowlands—and the central feature of the Appalachian Mountain system. The trough stretches about 1200 mi from Quebec to Alabama and has been an important north-south route of travel since prehistoric times.
Broad Mountain (Lehigh Valley) Broad Mountain or Broad Ridge in the Ridge-and-Valley Appalachians in Carbon County and Schuylkill County in Eastern Pennsylvania is a steep-faced, anthracite-bearing barrier ridge just south of both Beaver Meadows and Weatherly, north of Nesquehoning and west & south of the Lehigh River basin (so the west of the SW-border of the Poconos). The Mountain ridge line is mostly flat and looks very similar to the man made piles of culm in the region from the roads and towns looking up; being a natural mountain, it is quite different when under one's feet.