Bighorn Lake

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Bighorn Lake
Bighorn Lake WY & MT - SW part.jpg
Southwestern part
Location Big Horn / Carbon counties in Montana; and Big Horn County in Wyoming
Coordinates 45°18′28″N 107°57′27″W / 45.30778°N 107.95750°W / 45.30778; -107.95750Coordinates: 45°18′28″N 107°57′27″W / 45.30778°N 107.95750°W / 45.30778; -107.95750
Type reservoir
Primary inflows Bighorn River
Primary outflows Bighorn River
Catchment area 20,000 square miles (50,000 km2)
Basin countries United States

Bighorn Lake is a reservoir behind Yellowtail Dam within the Bighorn Canyon National Recreation Area, located in southern Montana and northern Wyoming.


Eastern section of Bighorn Lake reservoir in Bighorn Canyon.

The reservoir is 40 mi (64 km) south of Billings, Montana. It stretches the entire 72 mi (115 km) length of the Bighorn Canyon at full pool.

Bighorn Lake was created by the 1965 construction of Yellowtail Dam on the Bighorn River, near Fort Smith, Montana.

See also[edit]