U.S. Route 491 (US 491) is a north–south U.S. Highway serving the Four Corners region of the United States. It was created in 2003 as a renumbering of U.S. Route 666 (US 666). With the US 666 designation, the road was nicknamed the "Devil's Highway" because of the significance of the number 666 to many Christian denominations as the Number of the Beast. This Satanic connotation, combined with a high fatality rate along the New Mexico portion, convinced some people the highway was cursed. The problem was compounded by persistent sign theft. These factors led to two efforts to renumber the highway, first by officials in Arizona, then by those in New Mexico. There have been safety improvement projects in recent years, and fatality rates have subsequently decreased.
State Route 74, part of which forms the Palms to Pines Scenic Byway or Pines to Palms Highway, and the Ortega Highway, is a state highway in the U.S. state of California. It runs from Interstate 5 in San Juan Capistrano in Orange County to the city limits of Palm Desert in Riverside County. Stretching about 111 miles (179 km), it passes through several parks and National Forests between the Pacific coast and the Coachella Valley.
U.S. Route 163 is a 64-mile (103 km) U.S. Highway that runs from US 160 northward to US 191 in the U.S. states of Arizona and Utah. The southernmost 44 miles (71 km) of its length are within the Navajo Nation. The highway forms part of the Trail of the Ancients, a National Scenic Byway. The highway cuts through the heart of Monument Valley and has been featured in numerous movies and commercials.
U.S. Route 191 is a spur of U.S. Route 91 that has two branches. The southern branch runs for 1,465 miles (2,358 km) from Douglas, Arizona on the Mexican border to the southern part of Yellowstone National Park. The northern branch runs for 440 miles (710 km) from the northern part of Yellowstone National Park to Loring, Montana, at the Canada–US border. Unnumbered roads within Yellowstone National Park connect the two branches. The highway passes through the states of Arizona, Utah, Wyoming, and Montana.
State Route 12 or Scenic Byway 12 (SR-12), also known as "Highway 12 — A Journey Through Time Scenic Byway", is a 122.863-mile-long (197.729 km) state highway designated an All-American Road located in Garfield County and Wayne County, Utah, United States.
The State Scenic Highway System in the U.S. state of California is a list of highways, mainly state highways, that have been designated by the California Department of Transportation (Caltrans) as scenic highways. They are marked by the state flower, a California poppy, inside either a rectangle for state-maintained highways or a pentagon for county highways.
State Route 159 is a 31.204-mile (50.218 km) east–west highway in Clark County, Nevada, United States, providing access to Red Rock Canyon and serving as a thoroughfare in the Las Vegas metropolitan area. A portion of the west end of the route is designated a Nevada Scenic Byway.
State Route 128 (SR-128) is a 44.564-mile-long (71.719 km) state highway in the U.S. state of Utah. The entire length of the highway has been designated the Upper Colorado River Scenic Byway, as part of the Utah Scenic Byways program. This road also forms part of the Dinosaur Diamond Prehistoric Highway, a National Scenic Byway. Residents of Moab frequently refer to SR-128 as "the river road", after the Colorado River, which the highway follows.
State Route 821 (SR 821) is a state highway in central Washington state. It runs for 25 miles (40 km) through the Yakima Canyon, following the meandering Yakima River between Selah and Ellensburg. Both ends of the highway are at interchanges with Interstate 82 (I-82) and U.S. Route 97 (US 97).
Interstate 70 (I-70) is a mainline route of the Interstate Highway System in the United States connecting Utah and Maryland. The Utah section runs east–west for approximately 232 miles (373 km) across the central part of the state. Richfield is the largest Utah city served by the freeway, which does not serve or connect any urban areas in the state. The freeway was built as part of a system of highways connecting Los Angeles and the Northeastern United States. I-70 was the second attempt to connect southern California to the east coast of the United States via central Utah, the first being a failed attempt to construct a transcontinental railroad. Parts of that effort were reused in the laying out of the route of I-70.
State Route 313 (SR-313) is a 22.506-mile-long (36.220 km) state highway in San Juan and Grand Counties in the U.S. State of Utah. The highway has been designated the Dead Horse Point Mesa Scenic Byway. The highway is an access road for both the Island in the Sky district of Canyonlands National Park and Dead Horse Point State Park. The highway is a toll road in Dead Horse Point State Park. Westbound traffic is charged a state park entrance fee at the park boundary.
State Route 279 is a state highway in the U.S. state of Utah. The highway was constructed in 1962–1963 to service the Cane Creek potash mine and processing plant southwest of Moab. The highway was named one of the most beautiful highways opened to traffic in 1963. The entire length of SR-279 has been designated the Potash – Lower Colorado River Scenic Byway by the Utah State Legislature, however is known locally as Potash Road.
U.S. Route 89 in the U.S. state of Utah is a north-south United States Highway spanning more than 502 miles (807.891 km) through the central part of the state, making it the longest road in Utah. Between Provo and Brigham City, US-89 serves as a local road, paralleling Interstate 15, but the portions from Arizona north to Provo and Brigham City northeast to Wyoming serve separate corridors. The former provides access to several national parks and Arizona, and the latter connects I-15 with Logan, the state's only Metropolitan Statistical Area not on the Interstate.
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 Dinosaur Diamond is a 486-mile (782 km) scenic and historic byway loop through the dinosaur fossil laden Uinta Basin of the U.S. states of Utah and Colorado. The byway comprises the following two National Scenic Byways:
The Energy Loop: Huntington/Eccles Canyons Scenic Byway is a National Scenic Byway in the state of Utah. It spans approximately 83 miles (134 km) as it travels from Fairview through the Manti-La Sal National Forest southeast to Huntington via Huntington Canyon, and northeast to near Colton via Eccles Canyon.
State Route 143 (SR-143) is a state highway in the U.S. state of Utah. The entire highway has been designated the Brian Head-Panguitch Lake Scenic Byway as part of the Utah Scenic Byways program. This road has also been designated as Utah's Patchwork Parkway as part of the National Forest Scenic Byway program.
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:
US 191 near Church Rock 
