Bighorn River Wind River Canyon near the town of Thermopolis. From there, the river flows through the Bighorn Basin in north central Wyoming, passing through Thermopolis and Hot Springs State Park. At the border with Montana, the river turns northeast, and flows past the north end of the Bighorn Mountains, through the Crow Indian Reservation, where the Yellowtail Dam forms the Bighorn Lake reservoir. The reservoir and the surrounding canyon are part of the Bighorn Canyon National Recreation Area. The Little Bighorn River joins the Bighorn near the town of Hardin, Montana. Approximately fifty miles farther downriver, the Bighorn River ends where
Battle of the Little Bighorn Riley, Kansas, during which time it fought one major engagement and numerous skirmishes, experiencing casualties of 36 killed and 27 wounded. Six other troopers had died of drowning and 51 in cholera epidemics. In November 1868, while stationed in Kansas, the 7th Cavalry under Custer had successfully routed Black Kettle's Southern Cheyenne camp on the Washita River in the Battle of Washita River, an attack which was at the time labeled a "massacre of innocent Indians" by the Indian Bureau. By the time of the Little Bighorn, half of the 7th Cavalry's companies had just returned from 18 months of