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 relieve pressure on Reno's detachment (according to the Crow scout Curley, possibly viewed by both Mitch Bouyer and Custer) by withdrawing the skirmish line into the timber on the edge of the Little Bighorn River. Had the U.S. troops come straight down Medicine Tail Coulee, their approach to the Minneconjou Crossing and the northern area of the village would have been masked by the high ridges running on the northwest side of the Little Bighorn River. That they might have come southeast, from the center of Nye-Cartwright Ridge, seems to be supported by Northern Cheyenne accounts of seeing the approach