The Delaware Water Gap is a water gap on the border of New Jersey and Pennsylvania where the Delaware River cuts through a large ridge of the Appalachian Mountains. The gap constitutes the southern portion of the Delaware Water Gap National Recreation Area.The Delaware Water Gap National Recreation Area is a 70,000 acres (28,000 ha) protected area administered by the National Park Service. It is located along the middle section of the Delaware River in New Jersey and Pennsylvania stretching from the Delaware Water Gap northward in New Jersey to the state line near Port Jervis, New York, and in Pennsylvania to the outskirts of Milford. A 40-mile (64 km) section of the Delaware River, entirely within the National Recreation Area, has been granted protected status as the Middle Delaware National Scenic River under the National Wild and Scenic Rivers System and is also administered by the National Park Service. This section of the river is the core of the historical Minisink region.