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| U.S. Route 191 (Wyoming) | |
|---|---|
| State | Wyoming |
| Type | US |
| Route | 191 |
| Length mi | NWK |
| Established | 1926 |
| Direction a | South |
| Terminus a | Arizona |
| Direction b | North |
| Terminus b | Montana |
U.S. Route 191 (Wyoming) is a north–south United States Numbered Highway traversing the Arizona border through Grand Canyon National Park, Yellowstone-adjacent corridors into Montana, passing key Wyoming communities and federal lands. The highway connects federal agencies, conservation areas, national forests, and urban centers while paralleling rivers, railroads, and historic wagon routes across Rocky Mountains terrain. Managed primarily by the Wyoming Department of Transportation with intersections linking to Interstate and U.S. routes, the corridor serves freight, tourism, and regional traffic between Salt Lake City, Billings, and Phoenix corridors.
U.S. Route 191 enters Wyoming from Utah near the Duchesne River-fed highlands and proceeds northeast through the Uinta Mountains and Wasatch County-adjacent basins toward Rock Springs, intersecting Interstate 80 and passing near Flaming Gorge National Recreation Area, Fremont County, and Sweetwater County. From Rock Springs the route climbs toward Wyoming Range foothills and joins U.S. Route 189 near Kemmerer, then continues north through Lincoln County and adjacent to the Bridger-Teton National Forest before reaching Jackson Hole, where it connects with U.S. Route 26, U.S. Route 89, and Wyoming Highway 22. North of Teton County US 191 runs alongside the Snake River corridor and crosses the Yellowstone River watershed en route to Gros Ventre Wilderness approaches and the southern gates of Yellowstone National Park. Continuing north, the highway traverses Park County, passing Powell and Cody near Shoshone National Forest, then parallels U.S. Route 14 and U.S. Route 16 as it proceeds toward Gardiner and the Yellowstone River corridor to the Montana border.
Designated in 1926 as part of the original United States Numbered Highway System, the Wyoming segment underwent multiple realignments tied to regional development, including early 20th century ties to the Lincoln Highway and later modifications influenced by New Deal era public works in Shoshone County-adjacent regions. Postwar investments connected US 191 with the expanding Interstate Highway System, notably interchange projects related to Interstate 80 and Interstate 90 corridors. Environmental reviews during the late 20th century, including National Environmental Policy Act-driven studies, affected alignments near Grand Teton National Park and Yellowstone National Park, reflecting coordination among the National Park Service, United States Forest Service, and Bureau of Land Management. Safety and capacity improvements in the 1990s and 2000s were funded via federal transportation bills endorsed by delegations including members of the United States House of Representatives from Wyoming and senators from Wyoming's congressional delegation; these upgrades addressed congestion near Jackson Hole Airport and freight demands linked to Union Pacific Railroad intermodal flows.
The corridor intersects major regional and national highways and facilities, including junctions with Interstate 80 at Rock Springs, concurrency segments with U.S. Route 189 near Kemmerer, crossings of U.S. Route 26 and U.S. Route 89 in the Jackson area, connections with U.S. Route 14 and U.S. Route 16 near Cody, and termini proximate to Montana Highway 1 and Montana Highway 87 at the state line. Additional notable intersections provide access to Wyoming Highway 22 toward Teton Village and ski areas served by Jackson Hole Mountain Resort, links to state routes servicing Riverton and Thermopolis, and connector ramps facilitating movement to Interstate 90 toward Billings and Sheridan. Freight and tourist interchanges also interface with U.S. Route 20 and U.S. Route 191-connecting spurs used for commercial logging and recreation access near Shoshone National Forest.
Special designations and temporary alignments have included business loops through Jackson and Cody that direct traffic to historic downtowns and gateways to Grand Teton National Park and Yellowstone National Park, as well as truck bypasses created to manage oversized loads servicing energy developments in Sublette County and Sweetwater County. Seasonal detours occur for winter closures near high passes influenced by storms tied to the Pacific Ocean storm track and El Niño–Southern Oscillation variability, requiring coordination with the Wyoming Highway Patrol and Federal Highway Administration for closures and reopening schedules. Preservation-driven alternate alignments near historic sites have been coordinated with the Historic American Engineering Record and state historic preservation offices.
Traffic volumes vary widely, with peak seasonal flows adjacent to Grand Teton National Park and Yellowstone National Park driven by domestic and international tourism from markets like Canada, United Kingdom, and Germany. Year-round freight patterns reflect resource extraction and agricultural corridors linking to Interstate 80 and Interstate 90 freight lanes, while winter maintenance prioritizes rockfall mitigation and avalanche control near alpine passes in collaboration with the National Oceanic and Atmospheric Administration for weather forecasting. Pavement preservation and bridge rehabilitation projects are funded under federal surface transportation acts overseen by the Federal Highway Administration and implemented by the Wyoming Department of Transportation, with engineering standards influenced by the American Association of State Highway and Transportation Officials.
The route provides direct access to major conservation and recreation areas including Grand Teton National Park, Yellowstone National Park, Shoshone National Forest, Bridger-Teton National Forest, and the Flaming Gorge National Recreation Area, supporting wildlife viewing for species like American bison, Grizzly bear, Gray wolf, and Elk. It serves trailheads for long-distance routes such as the Continental Divide Trail, connects to river recreation on the Snake River and Yellowstone River, and underpins gateway economies in Jackson Hole and Cody that rely on visiting artists, outfitters, and lodges accredited by organizations like National Trust for Historic Preservation and tour operators tied to National Park Service concessions. The corridor's scenic byways and vista points contribute to regional heritage tourism promoted by state tourism bureaus and national conservation NGOs.
Category:U.S. Highways in Wyoming Category:Transportation in Wyoming