Montana Highway 200

Montana Highway 200
MT 200 highlighted in red
Route information
Maintained by MDT
Length	706.584 mi[1] (1,137.137 km)
Existed	October 1967[2]–present
Tourist routes	Lewis and Clark Trail
Major junctions
West end	SH-200 at the Idaho state line
Major intersections	US 93 from Ravalli to Missoula I-90 from Wye to Bonner US 12 from Missoula to Bonner US 287 near Milford Colony US 89 from Sun River to Armington I-15 from Vaughn to Great Falls US 87 from Great Falls to Grass Range US 191 from near Hobson to Lewistown
East end	ND 200 at the North Dakota state line
Location
Country	United States
State	Montana
Counties	Sanders, Lake, Missoula, Powell, Lewis and Clark, Cascade, Judith Basin, Fergus, Petroleum, Garfield, McCone, Dawson, Richland
Highway system
Montana Highway System Interstate US State Secondary
← US 191 → US 212

Montana Highway 200 (MT 200) in the U.S. state of Montana is a route running east–west covering the entire state of Montana. From the starting point at ID 200, near Heron, the highway runs east to ND 200 near Fairview. It is part of a chain of state highways numbered 200 that extend from Idaho across Montana, North Dakota, and Minnesota, totaling approximately 1,356 miles (2,182 km) long. At 706.272 mi (1,136.635 km),^[1] Montana Highway 200 is also the longest route signed as a state highway in the United States. Highway 200 helps to connect many small towns located in central Montana and the vast plains area of eastern Montana, to larger western Montana cities such as Great Falls and Missoula.