30,722 campgrounds
Sierra National Forest
Nantahala National Forest
Mt. Hood National Forest
Manistee National Forest
Wasatch National Forest
Inyo National Forest
Tahoe National Forest
Six Rivers National Forest
Eldorado National Forest
Cache National Forest
Huron National Forest
Willamette National Forest
Deschutes National Forest
Wenatchee National Forest
Big South Fork National River and Recreation Area
Los Padres National Forest
Mt. Baker National Forest
Angeles National Forest
Whitman National Forest
Shasta National Forest
