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A 1775 map of the Allegheny Plateau and Mountain Range. Trans-Allegheny travel had been facilitated when a military trail—Braddock Road—was blazed and opened by the Ohio Company in 1751. (It followed an earlier Indian and pioneer trail known as Nemacolin's Path.)
Spruce Mountain, visible behind Judy Rocks, in eastern West Virginia; the summit of Spruce Mountain, Spruce Knob, is the highest point in the Alleghenies at 4,863 feet (1,482 meters). Allegheny Mountains in the Monongahela National Forest of West Virginia seen from the slopes of Back Allegheny Mountain looking east.
The Allegheny Ridge is prominently shown in the map center-left, the gaps of the Allegheny Front are located in the border area between Cambria County (uplands) and Huntingdon County (lowlands). USGS - Appalachians Mountain chain showing the lines of the barrier ridges in central, western, and northwestern Pennsylvania.
The Allegheny Plateau (/ ˌ æ l ɪ ˈ ɡ eɪ n i / AL-ig-AY-nee) is a large dissected plateau area of the Appalachian Mountains in western and central New York, northern and western Pennsylvania, northern and western West Virginia, and eastern Ohio. It is divided into the unglaciated Allegheny Plateau and the glaciated Allegheny Plateau.
The Allegheny Front is the major southeast- or east-facing escarpment in the Allegheny Mountains in southern Pennsylvania, western Maryland, eastern West Virginia, and western Virginia. The Allegheny Front forms the boundary between the Ridge-and-Valley Appalachians to its east and the Appalachian Plateau (locally called the Allegheny Plateau ...
Allegheny Mountains: mountain: Bedford County, Pennsylvania: 846 Mary's Rock: Blue Ridge Mountains ...
The Allegheny National Forest is a National Forest in Northwestern Pennsylvania, about 100 miles northeast of Pittsburgh. The forest covers 513,175 acres (801.8 sq mi; 2,076.7 km 2 ) of land. Within the forest is Kinzua Dam , which impounds the Allegheny River to form Allegheny Reservoir .
Allegheny Mountain (spelling as Alleghany Mountain in Virginia) is a major mountain ridge in the southern range of the Allegheny Mountains, part of the Appalachian Mountains. It forms the Eastern Continental Divide along part of its course and also serves as part of the Virginia – West Virginia state line.