Ranges of the Appalachian system in Pennsylvania, Maryland, Virginia, and West Virginia, U.S., west of and generally parallel to the
They extend some 500 mi (800 km) south-southwestward, with heights of more than 4,800 ft (1,460 m). The eastern slope is sometimes called the Allegheny Front, while the Allegheny Plateau spans the entire upland area from the {{link=Cumberland Plateau">Cumberland Plateau to the Mohawk Valley in New York.