The Wind River is the name applied to the upper reaches of the Bighorn River in Wyoming in the United States.

The Wind River is 185 miles (298 km)[3] long.

Its headwaters are at Wind River Lake in the Rocky Mountains, near the summit of Togwotee Pass (pronounced TOH-guh-tee) and gathers water from several forks along the northeast side of the Wind River Range in west central Wyoming.

Up stream from this confluence, it is known locally as the Big Wind River.

In the Owl Creek Mountains, it is dammed to form Boysen Reservoir.