The Red Desert is a high-altitude desert and sagebrush steppe located in the south-central portion of the U.S. state of Wyoming, comprising approximately 9,320 square miles. Among the natural features in the Red Desert region are the Great Divide Basin, a unique endorheic drainage basin formed by a division in the Continental Divide, and the Killpecker Sand Dunes, the largest living dune system in the United States. In the 19th century, the Oregon, California, and Mormon Trails crossed the Continental Divide at South Pass, just north of the Red Desert. Today, busy Interstate 80 bisects the desert's southern region while gas field roads cross the desert.
The Killpecker Sand Dunes of the Red Desert support a wide range of wildlife and vegetation, ranging from elk who use the adjoining sagebrush steppe for shelter to aquatic organisms that thrive in snowmelt ponds. Photo by the Bureau of Land Management.
Melting snowpack is the primary source of surface water in Wyoming, such as this temporary wetland in the Muddy Creek Watershed of the Red Desert.
Summer rains produce standing water in the desert, which supports wildlife, such as pronghorn, deer, and birds.
Steamboat Mountain, overlooking the Killpecker Sand Dunes, provides habitat for desert elk.
The Great Divide Basin or Great Divide Closed Basin is an area of land in the Red Desert of Wyoming where none of the water falling as rain to the ground drains into any ocean, directly or indirectly. It is thus an endorheic basin, one of several in North America that adjoin the Continental Divide. To the south and west of the basin is the Green River watershed, draining to the Gulf of California/Pacific Ocean; to the north and east is the North Platte watershed, draining to the Gulf of Mexico. The basin is very roughly rectangular in shape; the northwest corner is at Oregon Buttes near South Pass, about 40 miles (64 km) southwest of Lander, and the southeast corner is in the Sierra Madre Range near Bridger Pass, about 20 miles (32 km) southwest of Rawlins.
Thunderstorm over the Great Divide Basin