28,770 campgrounds
Whitman National Forest
Shasta National Forest
Nicolet National Forest
Lincoln National Forest
Apache National Forest
Clearwater National Forest
Angeles National Forest
San Bernardino National Forest
Arapaho National Forest
Shasta-Trinity National Forest
Ashley National Forest
St. Joe National Forest
Mt. Hood National Forest
Wallowa National Forest
Los Padres National Forest
Modoc National Forest
San Isabel National Forest
Fremont National Forest
