Bighorn Mountains

Range of the Rocky Mountains lying principally in north Wyoming, USA, to the east of the Bighorn River. The range runs northwest to southeast for nearly 200 km/125 mi, and has a number of summits over 3,000 m/9,800 ft, culminating in Cloud Peak, 4,019 m/13,186 ft. At the north end of the range, in the Crow Reservation in southeast Montana, is the site of the Battle of Little Bighorn 1876. The foothills are used for livestock grazing and irrigated agriculture. The mountains are a popular visitor destination.

The mountains are composed of sedimentary rocks with a granite nucleus. Bighorn National Forest, in the Wyoming part of the range, contains pine, spruce, and fir trees.