Allegheny Mountains

Allegheny Mountains
Allegheny Mountains
	View from atop Spruce Mountain in eastern West Virginia, the highest point in the Alleghenies
Highest point
Peak	Spruce Knob of Spruce Mountain, Pendleton County, West Virginia
Elevation	4,863 ft (1,482 m)
Coordinates	38°41′59″N 79°31′58″W / 38.69972°N 79.53278°W
Geography
	Map showing the Allegheny Mountains (in purple) as part of the larger Appalachian Plateau province of the Appalachian Highlands physiographic division. (USGS)
Country	United States
States	Pennsylvania; Maryland; West Virginia; Virginia;
Parent range	Ridge-and-valley Appalachians
Borders on	Cumberland Mountains
Geology
Orogeny	Alleghenian orogeny
Rock types	Sandstone; Quartzite;

The Allegheny Mountain Range (/ˌælɪˈɡeɪni/ AL-ig-AY-nee; also spelled Alleghany or Allegany), informally the Alleghenies, is part of the vast Appalachian Mountain Range of the Eastern United States and Canada and posed a significant barrier to land travel in less developed eras. The Allegheny Mountains have a northeast–southwest orientation, running for about 300 miles (480 km) from north-central Pennsylvania southward, through western Maryland and eastern West Virginia.

The Alleghenies comprise the rugged western-central portion of the Appalachians. They rise to approximately 4,862 feet (1,482 m) in northeastern West Virginia. In the east, they are dominated by a high, steep escarpment known as the Allegheny Front. In the west, they slope down into the closely associated Allegheny Plateau, which extends into Ohio and Kentucky. The principal settlements of the Alleghenies are Altoona, State College, and Johnstown, Pennsylvania; and Cumberland, Maryland.

Using the USGS classification of physical geography (physiography), the Allegheny Mountain range is part of the Appalachian Plateau province of the Appalachian Highlands physiographic division.