Bighorn River river passes through Yellowtail Dam and Afterbay Dam. The river turns to the northeast and enters the Great Plains. At Hardin the river is joined by the Little Bighorn River. Approximately downriver from the Little Bighorn, in Big Horn County, the Bighorn empties into the Yellowstone. The Bighorn River has also been known as the Great Horn River, Le Corne and Iisaxpúatahcheeaashisee in the Apsáalooke language which translates to English as "Large Bighorn Sheep River". Bighorn River The Bighorn River is a tributary of the Yellowstone, approximately long, in the states of Wyoming and Montana in the western United States.
Little Bighorn River along the tributaries commonly use the shortened version—Little Horn—instead of the more cumbersome name, Little Bighorn. A historical variant name for the Little Bighorn is the Greasy Grass. From the 1500s to the 1800s, the indigenous Crow people knew the river as the Greasy Grass. Crow tribal historian Joe Medicine Crow explained in a 2012 YouTube interview that this name was used by the Crows for the river system because in the river bottoms in the upper reaches of the Little Bighorn and its major tributaries there was abundant grass that would gather heavy dew in the morning which, in