Positioned between the Colorado, Green, and Dirty Devil Rivers in Utah lies a wild stretch of land that became known as Robbers' Roost. The area afforded hundreds of hiding spots and was difficult to penetrate, as the only easy access is via the mouth of the Dirty Devil River.

It is believed that the first person to use the area as a hideout was the outlaw Mike Cassidy. He introduced it to his protégé, Butch Cassidy. Later the area became a hideout for Cassidy's gang, the Wild Bunch during the 1890s. One member of the gang claimed that as many as 200 outlaws lived in Robbers' Roost. The hiding-place was abandoned in 1902 after Cassidy and the Sundance Kid left for South America.