28,186 campgrounds
Okanogan National Forest
Umpqua National Forest
Plumas National Forest
Lewis & Clark National Forest
Wallowa National Forest
Toiyabe National Forest
Willamette National Forest
Challis National Forest
San Bernardino National Forest
San Juan National Forest
Chattahoochee National Forest
Francis Marion National Forest
Little Missouri National Grassland
Bridger-Teton National Forest
Snoqualmie National Forest
Wenatchee National Forest
Modoc National Forest
Tahoe National Forest
Sumter National Forest
Pike National Forest
Ozark National Forest
Nezperce National Forest
