30,105 campgrounds
San Bernardino National Forest
Eldorado National Forest
Crooked River National Grassland
Stanislaus National Forest
Chattahoochee National Forest
Sumter National Forest
Wallowa National Forest
Klamath National Forest
Routt National Forest
George Washington National Forest
Medicine Bow National Forest
Lassen National Forest
Bighorn National Forest
Lyndon B. Johnson National Grassland
Beaverhead National Forest
Umatilla National Forest
Bridger-Teton National Forest
Custer National Forest
Flathead National Forest
Challis National Forest
Apache National Forest
Willamette National Forest
