National Park Service, Pennsylvania.
Situated within the most densely populated region of the United States, Delaware Water Gap National Recreation Area provides a unique opportunity to experience tranquil landscapes, rich human history, and striking scenery along 40 miles of the longest free-flowing river east of the Mississippi. The park offers year-round recreation including hiking, paddling, fishing, and hunting.
Delaware Water Gap National Recreation Area is a long, narrow park that sits between two major interstates, I-80 at the south and I-84 at the north. US 209 is the main north/south road through the park on the Pennsylvania side and Old Mine Road is the main north/south road though the park on the New Jersey side.