• Fulmer Falls at George W. Childs Park

    Delaware Water Gap

    National Recreation Area NJ,PA

Park Bulletins on Nature & Science

About the Delaware Water Gap
How the Gap Formed
What is a "water gap"? Theories of its origins, and descriptions of other gaps in the area.

Advanced Mt. Tammany Geology
Notable geological features on the way to the top of Mt. Tammany, including a map of the Red Dot and Blue Blazed Trails. For advanced students of geology.

Invasive Species
Firewood pests
Reasons for the quarantine on firewood from outside the park: asian longhorned beetle and emerald ash-borer.

Did You Know?


... that hemlock groves in Delaware Water Gap National Recreation Area are threatened by a non-native insect, the hemlock woolly adelgid. Hemlocks provide shade for spectacular rhodondenron, for trout streams, and for native wildflowers. As hemlocks weaken and die, they are cut down for your safety. More...