U.S. Route 191 in Utah
| US 191 highlighted in red | ||||
| Route information | ||||
| Maintained by UDOT | ||||
| Length | 404.168 mi (650.445 km) | |||
| Existed | 1981–present | |||
| Tourist routes | US 191 from Crescent Junction through Vernal is part of the Dinosaur Diamond Prehistoric Highway | |||
| NHS | South of I-70 and concurrencies with I-70, US 6, and US 40 | |||
| Major junctions | ||||
| South end | US 191 / BIA Route 12 towards Mexican Water, AZ | |||
| North end | US 191 towards Rock Springs, WY | |||
| Location | ||||
| Country | United States | |||
| State | Utah | |||
| Counties | San Juan, Grand, Emery, Carbon, Duchesne, Uintah, Daggett | |||
| Highway system | ||||
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U.S. Route 191 (US 191) is a major 404.168-mile (650.445 km), north–south U.S. Numbered Highway through eastern Utah, United States. The present alignment of US 191, which stretches from Mexico to Canada, was created in 1981 through Utah. Previously the route had entered northern Utah, ending at US 91 in Brigham City, but with the completion of Interstate 15 it was truncated to Yellowstone National Park and re-extended on a completely different alignment. In addition to a large portion of U.S. Route 163 in Utah (|US 163, this extension absorbed several state routes: the former Utah State Route 33, most of Utah State Route 44, and the former Utah State Route 260.