16,550 campgrounds
Grand Teton National Park
New River Gorge National Park and Preserve
Yellowstone National Park
Guadalupe Mountains National Park
Hot Springs National Park
Glacier National Park
Saguaro National Park
Canyonlands National Park
Olympic National Park
North Cascades National Park
Haleakala National Park
Great Smoky Mountains National Park
Yosemite National Park
Joshua Tree National Park
Mount Rainier National Park
