The Monongahela National Forest is a national forest located in the Allegheny Mountains

Allegheny Mountains

The Allegheny Mountain Range , also spelled Alleghany, Allegany and, informally, the Alleghenies, is part of the vast Appalachian Mountain Range of the eastern United States and Canada...

 of eastern West Virginia

West Virginia

West Virginia is a state in the Appalachian and Southeastern regions of the United States, bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the northeast and Maryland to the east...

, USA. It protects over 919000 acre (3,719 km²; 1,436 sq mi) of federally-owned land within a 1700000 acre (6,880 km²; 2,656 sq mi) proclamation boundary that includes much of the Potomac Highlands Region

Potomac Highlands of West Virginia

The Potomac Highlands of West Virginia centers on five counties in the upper Potomac River watershed in the western portion of the state's Eastern Panhandle, bordering Maryland and Virginia...

 and portions of 10 counties.

The MNF includes some major landform features such as the Allegheny Front

Allegheny Front

The Allegheny Front is the major southeast- or east-facing escarpment in the Allegheny Mountains in southern Pennsylvania, western Maryland, and eastern West Virginia, USA. The Allegheny Front delineates the Ridge-and-Valley Appalachians to its east from the Appalachian Plateau to its west...

 and the western portion of the Ridge-and-valley Appalachians

Ridge-and-valley Appalachians

The Ridge-and-Valley Appalachians, also called the Ridge and Valley Province or the Valley and Ridge Appalachians, are a physiographic province of the larger Appalachian division and are also a belt within the Appalachian Mountains extending from southeastern New York through northwestern New...

.