Parks in Montana, Wyoming, North and South Dakota, Kansas, Oklahoma, Nebraska, and parts of Colorado and Utah.
Wind Cave National Park, SD
Wind Cave National Park, SD
Great Sand Dunes National Park and Preserve, CO
Great Sand Dunes National Park and Preserve, CO
Black Canyon of Gunnison National Park, CO
Black Canyon of Gunnison National Park, CO
Yellowstone National Park
Yellowstone National Park