Route information | ||||
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Maintained by MDT | ||||
Length | 442.161 mi[1] (711.589 km) | |||
Major junctions | ||||
South end | Yellowstone National Park at West Yellowstone | |||
North end | Highway 4 at the Canadian border at Morgan | |||
Location | ||||
Country | United States | |||
State | Montana | |||
Counties | Gallatin, Park (Wyoming), Park (Montana), Sweet Grass, Wheatland, Fergus, Phillips | |||
Highway system | ||||
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U.S. Highway 191 (US 191) is a north-south United States Numbered Highway in the state of Montana. It extends approximately 442.2 miles (711.7 km) from Yellowstone National Park north to the Canadian border.