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.
Powell Mountain Powell Mountain (or "Powells Mountain") is a mountain ridge of the Ridge-and-valley Appalachians of the Appalachian Mountains. It is a long and narrow ridge, running northeast to southwest, from about Norton, Virginia to near Tazewell, Tennessee. It separates the Clinch River basin and the Powell River basin of Powell Valley. It was named for an 18th-century explorer.