30,216 campgrounds
Olympic National Park
Denali National Park and Preserve
Grand Canyon National Park
Yosemite National Park
Mount Rainier National Park
Isle Royale National Park
Indiana Dunes National Park
New River Gorge National Park and Preserve
Great Basin National Park
Redwood National and State Parks
Rocky Mountain National Park
Wind Cave National Park
Death Valley National Park
Big Bend National Park
Kenai Fjords National Park
North Cascades National Park
