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 The great majority of the Indian casualties were probably suffered during this closing segment of the battle, as the soldiers and Indians on Calhoun Ridge were more widely separated and traded fire at greater distances for most of their portion of the battle than did the soldiers and Indians on Custer Hill. After the Custer force was soundly defeated, the Lakota and Northern Cheyenne regrouped to attack Reno and Benteen. The fight continued until dark (approximately 9:00 pm) and for much of the next day, with the outcome in doubt. Reno credited Benteen's luck with repulsing a severe attack on