The Little Bighorn River is a 138-mile-long tributary of the Bighorn River in the United States in the states of Montana and Wyoming. The Battle of the Little Bighorn, also known as the Battle of the Greasy Grass, was fought on its banks on June 25–26, 1876, as well as the Battle of Crow Agency in 1887.
Country: Big Horn County, Montana and Sheridan County, Wyoming