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 I-15 it was truncated to Yellowstone National Park and re-extended on a completely different alignment. In addition to a large portion of US-163, this extension absorbed several state routes: SR-33, most of SR-44, and SR-260.

The Trail of the Ancients is a collection of National Scenic Byways located in the U.S. Four Corners states of Utah, Colorado, New Mexico, and Arizona. These byways comprise:The 366-mile (589 km) Trail of the Ancients National Scenic Byway in San Juan County, Utah; The 116-mile (187 km) Trail of the Ancients Scenic and Historic Byway in Montezuma County, Colorado; The 662.4-mile (1,066 km) Trail of the Ancients Scenic Byway in McKinley and San Juan counties, New Mexico; The 100.3-mile (161 km) Dine' Tah "Among the People" Scenic Road in Apache County, Arizona, and the 26-mile (42 km) Kayenta-Monument Valley Scenic Road in Navajo County, Arizona.