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)
Pennsylvania Fast Facts Pennsylvania (PA) is one of the Middle Atlantic states and part of the Northeastern region of the United States. It is bordered by New Jersey across the Delaware River, Delaware, Maryland, West Virginia, Ohio, and Lake Erie and New York. It's southeastern portion is part of the Delaware Valley region. Area, 45,333 sq mi (117,412 sq km).