28,678 campgrounds
Flathead National Forest
Challis National Forest
George Washington National Forest
Apache National Forest
Humboldt-Toiyabe National Forest
Coeur d'Alene National Forest
Mt. Hood National Forest
Uinta National Forest
Carson National Forest
Jefferson National Forest
Rogue River National Forest
Siuslaw National Forest
Angeles National Forest
Cleveland National Forest
Ozark National Forest
Mt. Baker National Forest
Tonto National Forest
Hiawatha National Forest
Gifford Pinchot National Forest
Stanislaus National Forest
Humboldt National Forest
Willamette National Forest
