Buffalo to Alpine, WY Drive: Scenic I-90/US-89 Route

Buffalo, WY sits at the eastern base of the Bighorn Mountains, and the drive to Alpine, WY (~280 miles) crosses two mountain ranges, the Bighorns and the Wind Rivers, with a slice of the Absarokas. Plan for at least 5 hours of pure driving time, but budget a full day to appreciate what lies between. The route starts on I-90 west, then takes US-16 over Powder River Pass, and joins US-26/US-287 through Wind River Canyon. These roads are part of the Wyoming Scenic Byways system, offering dramatic elevation changes from 4,600 feet in Buffalo to 9,677 feet at Powder River Pass.

The route passes through the Bighorn National Forest, offering alpine meadows and granite peaks. At Powder River Pass, you'll cross the Continental Divide, which also demarcates the western edge of the Great Plains. Further west, Wind River Canyon is a narrow gorge cut through ancient Precambrian rock, with walls rising 2,500 feet. Short hikes like the Shell Falls Interpretive Trail provide quick, accessible views. Hidden off-route spots include the Medicine Lodge State Archaeological Site, known for petroglyphs, just southeast of Hyattville.

Local commerce thrives in small towns: Ten Sleep's mercantile sells homemade jerky, and Thermopolis (a short detour) is home to the world's largest mineral hot spring. The diverse geology—from sedimentary to volcanic—supports unique wildlife viewing, including bighorn sheep and pronghorn. For more ideas on discovering such gems, see how to find the best stops and hidden gems between cities.

Road quality is generally good, but mountain passes require attention: use lower gears on descents and watch for wildlife at dawn and dusk. For family and child suitability, stops like the Bighorn National Forest's interpretive trails and the Wind River Canyon's pullouts are educational and safe. Many picnic areas have restrooms, but alcohol is prohibited in state parks. Pet-friendly framework: most pullouts allow dogs on leashes, but not inside visitor centers. Carry water and waste bags.

Fatigue management: plan rest stops every 2 hours; major towns like Worland and Dubois have multiple gas stations and fast food. The route is not known for heavy traffic, but summer brings RVers, so leave extra space. Culinary infrastructure: expect diners and cafes in Buffalo, Ten Sleep, Worland, Thermopolis, Dubois, and Alpine—try the local trout in Dubois. For rest zones, note that official rest areas exist near Buffalo and after Thermopolis, but numerous turnouts offer scenic breaks.

The full route spans US-16, I-25, US-20, US-26, US-287, and US-89, so GPS is essential. Fuel stops are sparse between Buffalo and Worland (about 120 miles) but available in Ten Sleep and Worland. Gas prices in rural Wyoming often run $0.20–$0.50 higher than in cities, so fill up in Buffalo or Casper before heading west. The road surface is well-maintained asphalt, but be prepared for narrow shoulders on mountain passes and occasional gravel near construction. Winter brings snow closures at Powder River Pass, so check WYDOT road conditions before departure.

• How long to drive Buffalo, WY to Alpine, WY: 5–6 hours nonstop, but plan 8–10 with stops.
• Is it worth driving Buffalo, WY to Alpine, WY? Absolutely, for the geological variety and access to two national forests.