16,553 campgrounds
Redwood National and State Parks
Grand Teton National Park
Theodore Roosevelt National Park
Big Bend National Park
Lassen Volcanic National Park
Hawaii Volcanoes National Park
Olympic National Park
Katmai National Park and Preserve
Kenai Fjords National Park
Glacier National Park
Canyonlands National Park
Isle Royale National Park
Yellowstone National Park
Great Smoky Mountains National Park
Everglades National Park
Great Basin National Park
Death Valley National Park
Yosemite National Park
Mammoth Cave National Park
