Member Login. The following was included in TCTA's 2015-16 Survival Guide, the ultimate reference tool for Texas educators, and is current as of September 2015 but is subject to change.
The Allegheny Mountains run diagonally from the southwest to the northeast with piedmont and coastal plains in the southeast triangle. The Allegheny Front, as it's called, cuts a diagonal line across the state. In the northwest, the plateau falls to the Lake Erie lowlands and, finally, Lake Erie. ( Pennsylvania Close-up)
The highest point in Pennsylvania, Mount Davis, reaches 3,213 feet (979 m), and is located near the southern border of the state in Somerset County, approximately 100 miles (160 km) east of the southwestern corner, where the Appalachian Mountains enter Pennsylvania from the south.