28,871 campgrounds
Zion National Park
Olympic National Park
Canyonlands National Park
Yellowstone National Park
Isle Royale National Park
Great Smoky Mountains National Park
North Cascades National Park
Great Basin National Park
Sequoia National Park
Buffalo National River
Black Canyon of the Gunnison National Park
Lassen Volcanic National Park
Death Valley National Park
Yosemite National Park
