Allegheny Plateau

The Front extends from central Pennsylvania through Maryland and into eastern West Virginia.

The plateau is bordered on the west by glacial till plains in the north, generally north of the Ohio River, and the Bluegrass Region south of the Ohio River.

In the glaciated Allegheny Plateau, relief may only reach one hundred feet or less.

Absolute highest elevations in this area are often in the range of 900 to 1,500 feet (270 to 460 m).

The Allegheny Plateau is a physiographic section of the larger Appalachian Plateau province, which in turn is part of the larger Appalachian physiographic division.

Map of the Allegheny Plateau with the gray line differentiating the glaciated (northern) and unglaciated (southern) sections of the plateau.
Major fault at the dividing line between the Allegheny Plateau and the Appalachian Mountains in Williamsport, Pennsylvania
Canisteo River Valley from Pinnacle State Park in Steuben County, New York . Glaciation in this area of the plateau removed the sharp relief that is seen in the plateau's unglaciated areas. The line of the distant peaks approximates the level of a peneplain that was uplifted to form the plateau.
Aerial view of Allegheny Plateau terrain surrounding Weston, West Virginia