28,515 campgrounds
Mark Twain National Forest
George Washington National Forest
Black Hills National Forest
Inyo National Forest
Tahoe National Forest
Bienville National Forest
Ozark National Forest
Degray Lake — Shouse Ford
Sitgreaves National Forest
Bighorn National Forest
Lassen National Forest
Eldorado National Forest
Manistee National Forest
Wenatchee National Forest
Uncompahgre National Forest
Mt. Baker National Forest
Toiyabe National Forest
Stanislaus National Forest
