Original: The Allegheny Mountain Range (also spelled Alleghany and Allegany,) â "informally, the Allegheniesâ" is part of the vast Appalachian Mountain Range of the eastern United States and Canada.
Simplified: The Allegheny Mountain Range (also spelled Alleghany and Allegany) are a mountain range in Maryland, Pennsylvania, Virginia, and West Virginia. The Allegheny mountains are a part of the Appalachian Mountains in the eastern United States and Canada.