The term "Allegheny" primarily refers to the Allegheny River, which flows through western Pennsylvania and is a major tributary of the Ohio River. The river is approximately 325 miles long and is known for its scenic beauty, recreational opportunities, and historical significance in the development of the region. Additionally, "Allegheny" can refer to the Allegheny Mountains, part of the Appalachian Mountain range, which stretches across several states, including Pennsylvania and West Virginia. The mountains are characterized by their lush forests, diverse wildlife, and numerous outdoor activities such as hiking and camping.