Red Desert: 
The semiarid region of southwestern Wyoming, sometimes considered an extension of the Great Basin Desert.
The Red Desert of southern Wyoming is one of the last high-desert ecosystems in North America.

Its varied landscape of buttes, dunes, sagebrush steppe, mountains and rocky pinnacles is home to some of the continent's most hidden treasures:

The largest living dune system in the United States
The largest migratory herd of pronghorn in the lower 48 states
The world's largest herd of desert elk
And, at its heart, the Great Divide Basin--a large depression along the Continental Divide from which surface water does not flow out to either the Atlantic or the Pacific.