Spring Canyon Campground
Lake Roosevelt National Recreation Area
$12–23/night
State Park
Spring Gap Campground
Chesapeake & Ohio Canal National Historical Park
Free
State Park
Spur 406 Campground
Amistad National Recreation Area
$6/night
State Park
Squirrel Meadows Cabin
Grand Teton National Park
Free
State Park
Squirrel Springs Primitive Campsites
Great Basin National Park
Free
State Park
St. Mary Campground
Glacier National Park
Free
State Park
Staircase Campground
Olympic National Park
$20/night
State Park
Stanton Creek Primitive Campground
Glen Canyon National Recreation Area
Free
State Park
Steel Creek Campground - Buffalo National River
Buffalo National River
$20/night
State Park
Stevens Creek Campground
Curecanti National Recreation Area
Free
State Park
Stovepipe Wells Campground
Death Valley National Park
$14/night
State Park
Summit Lake North
Lassen Volcanic National Park
$24/night
State Park
Summit Lake South
Lassen Volcanic National Park
$22/night
State Park
Summit Lake Stock Corral
Lassen Volcanic National Park
$37/night
State Park
Tamarack Flat Campground
Yosemite National Park
Free
State Park
Telegraph Picnic Pavilion
Prince William Forest Park
Free
State Park
Temple Bar Marina RV Park - Lake Mead National Recreation Area
Lake Mead National Recreation Area
Free
State Park
Thorndike Campground
Death Valley National Park
Free
State Park
Timber Creek Campground
Rocky Mountain National Park
Free
State Park
Tow String Horse Camp
Great Smoky Mountains National Park
Free
State Park
Twin Creeks Picnic Pavilion
Great Smoky Mountains National Park
Free
State Park
Two Medicine Campground
Glacier National Park
$10–20/night
State Park
Warner Valley Campground
Lassen Volcanic National Park
$16/night
State Park
Watch Hill Family Campground
Fire Island National Seashore
Free
State Park