U.S. Route 191 in Montana

U.S. Highway 191
U.S. Highway 191
	US 191 highlighted in red
Route information
	Maintained by MDT
Length	442.161 mi (711.589 km)
Major junctions
South end	Yellowstone National Park at West Yellowstone
	US 20 / US 287 in West Yellowstone; I-90 from Bozeman to Big Timber; US 89 in Livingston; US 12 in Harlowton; US 87 / MT 200 from Moore to Lewistown; US 2 in Malta;
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
	United States Numbered Highway System; List; Special; Divided; Montana Highway System; Interstate; US; State; Secondary;

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.

^ Road Inventory and Mapping Section (2013). Montana Road Log (PDF). Helena: Montana Department of Transportation. pp. 41, 90–93, 96–97, 103–107, 159, 181–182, 208. Archived from the original (PDF) on January 1, 2020. Retrieved November 27, 2020.