of Helper. in Duchesne. The highways travel concurrently to Vernal. Wyoming in Purple Sage. The highways travel concurrently to Rock Springs. north of Daniel. The highways travel concurrently to Jackson. in Hoback Junction. US 26/US 191 travels concurrently to Moran. US 89/US 191 travels concurrently to the South Entrance to Yellowstone National Park. in Moran. US 191/US 287 travels concurrently to the South Entrance to Yellowstone National Park. Yellowstone National Park segment (unofficial designation) travels concurrently from the park's South Entrance to north-northwest of West Thumb. travels concurrently from the park's South Entrance to the park's West Entrance. in West Thumb. US 20/US 191 travels concurrently to the park's West Entrance. Northern segment Montana from the West Entrance to Yellowstone National Park; the highways travel concurrently to West Yellowstone. Wyoming No major intersections Montana in Bozeman. The highways travel concurrently to southwest of Big Timber. in Livingston. The highways travel concurrently to northeast of Livingston. in Harlowton. The highways travel concurrently to east of Harlowton. west-northwest of Moore. The highways travel concurrently to Lewistown. in Malta. The highways travel concurrently through Malta. at the Canada–United States border north-northeast of Loring References External links Endpoints of US 191 U.S. Route 191 91-1 91-1 91-1 91-1 91-1 1