Big Horn Basin

The Bighorn Basin is a plateau region and intermontane basin, approximately 100 miles (160 km) wide, in north-central Wyoming in the United States. It is bounded by the Absaroka Range on the west, the Bighorn Mountains on the east, and the Owl Creek Mountains and Bridger Mountains on the south. It is drained to the north by tributaries of the Bighorn River, which enters the basin from the south, through a gap between the Owl Creek and Bridger Mountains, as the Wind River, and becomes the Bighorn as it enters the basin. The region is semi-arid, receiving only 6–10 in (15–25 cm) of rain annually.

The largest cities in the basin include the Wyoming towns of Cody, Thermopolis, Worland, and Powell. Sugar beets are grown on irrigated farms in the region.

The basin was explored by John Colter in 1807. Just west of Cody, he discovered geothermal features that were later popularly called "Colter's Hell". The region was later transversed by the Bridger Trail, which was blazed in 1864 by Jim Bridger to connect the Oregon Trail to the south with Montana. The route was an important alternative to the Bozeman Trail, which had crossed the Powder River Country, but had been closed to white settlers following Red Cloud's War. Around the turn of the 20th century the Bighorn Basin was settled by ranchers such as William "Buffalo Bill" Cody who founded the town of Cody and owned a great deal of land surrounding the Shoshone River. In 1904, Cody helped to form the Shoshone project, the nation's first federal water development project to help irrigate the western portion of the basin. The project culminated in the construction of the Buffalo Bill Dam and reservoir. The wealth in the region also attracted outlaws. Butch Cassidy lived near Meeteetse for a while and was arrested at the insistence of local cattle baron Otto Franc and sent to the Wyoming State Penitentiary for horse theft. Following his release, he formed the Wild Bunch gang which operated from the Hole-in-the-Wall area southeast of the Bighorn Basin.

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