Highway 85 (MT 85) is a 6.704-mile-long (10.789 km) north–south state highway traversing the central Gallatin Valley in the U.S. State of Montana. The highway's southern terminus, just north of Bozeman Hot Springs and about 7 miles (11 km) west of Bozeman, is a census-designated place (CDP) known as "Four Corners." From Four Corners, U.S. Route 191 (US 191) runs east to Bozeman, and south to West Yellowstone; MT 84 travels west to Norris; and MT 85 runs north to Belgrade. The designated MT 85 terminates near the southern end of Belgrade, at an interchange with Interstate 90 (I-90).