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.
Battle of the Little Bighorn In 1805, fur trader Francois Antoine Larocque reported joining a Crow camp in the Yellowstone area. On the way he noted that the Crow hunted buffalo on the "Small Horn River". The US built Fort Raymond in 1807 for trade with the Crow. It was located near the confluence of the Yellowstone and the Bighorn River, about north of the future battlefield. The area is first noted in the 1851 Treaty of Fort Laramie. In the latter half of the 19th century, tensions increased between the Native inhabitants of the Great Plains of the US and encroaching settlers. This resulted