New Jersey, located in the northeastern U.S., is mostly covered by coastal plains, defined by gently rolling hills along the shoreline.
The Kittatinny Mountains, part of the Appalachian Mountains, occupy the northwest corner of the state. Here, the Delaware River has cut through and formed a deep water gap, the Delaware Water Gap. The 2,184-mile-long Appalachian National Scenic Trail, generally known as the Appalachian Trail or simply the AT, passes through this area. Moving southeast, New Jersey’s terrain is dominated by the Piedmont Plateau, dotted with small lakes, rivers, streams and valleys.