28,949 campgrounds
Dry Tortugas National Park
Mount Rainier National Park
Yosemite National Park
Redwood National and State Parks
Canyonlands National Park
Isle Royale National Park
Grand Teton National Park
New River Gorge National Park and Preserve
Yellowstone National Park
Olympic National Park
North Cascades National Park
Guadalupe Mountains National Park
Sequoia National Park
Hot Springs National Park
Glacier National Park
Saguaro National Park
