St. George to Dubois Road Trip: Utah to Wyoming Guide

This route from St. George, UT to Dubois, WY spans 550 miles along I-15 and US-26, crossing the Great Basin, the Wasatch Range, and the Wyoming Basin. The drive takes 9–10 hours without stops, but the journey rewards travelers with dramatic shifts from red rock canyons to alpine forests and high plains. One specific local quirk: between Nephi and Price, UT, you'll encounter the “Castle Country” where erosion has carved hoodoos that resemble medieval fortresses. The best stops St. George, UT to Dubois, WY are often found by veering off the interstate. Learn how to find the best stops and hidden gems between cities.

• Total distance: 550 miles (885 km)
• Estimated driving time: 9–10 hours
• Highways: I-15, US-6, US-191, US-26
• Best season: Late spring to early fall (May–September)

How long to drive St. George, UT to Dubois, WY? The non-stop drive takes about 9–10 hours, but realistcally plan for 12–14 hours with breaks and detours. Fuel stations are plentiful along I-15, but become sparse on US-191 in Wyoming. Gas prices in Utah average $0.10 cheaper per gallon than in Wyoming. Budget $60–$80 for fuel for a standard sedan. Tolls: none on this route.

• Key fuel stops: Beaver, UT; Nephi, UT; Price, UT; Rock Springs, WY
• Electric vehicle charging: Level 2 chargers in St. George, Salt Lake City, and Rock Springs
• Road conditions: I-15 is well-paved; US-191 in Wyoming can be narrow with occasional wildlife crossings
• Weather alerts: Winter snow can close US-191 (October–April)

Infrastructure safety & road quality: I-15 is a divided highway with rest areas every 50 miles; US-191 in Wyoming is two-lane with no median, so overtake with caution. Wildlife (deer, elk) frequent roads at dawn/dusk. Family and child suitability: stops include the George S. Eccles Dinosaur Park in Ogden, UT (life-sized dinosaur models) and the Wyoming Frontier Prison Museum in Rawlins. Pet-friendly framework: many rest areas have designated pet runs; motels in Price and Rock Springs welcome dogs. Fatigue management & rest zones: ideal stopping points at Fillmore (UT Rest Area, mile 150) and Green River (WY, mile 400) with picnic tables and shade.

• Emergency services: Dial 911; cellular coverage spotty in Wyoming (especially near Dubois)
• Hospital: St. George Regional Hospital (UT), Memorial Hospital of Sweetwater County (Rock Springs, WY)
• Family stop: Dinosaur Park, Ogden (exit 347 on I-15)
• Pet-friendly hotels: Days Inn Price, Best Western Rock Springs
• Hidden off-route spot: Fantasy Canyon (off US-191 near Ouray, UT) – 2-mile hike

Is it worth driving St. George, UT to Dubois, WY? Absolutely, for the diverse natural landscapes. Starting in St. George, the red sandstone of Zion National Park (detour 45 minutes). Near Price, Utah, the Cleveland-Lloyd Dinosaur Quarry holds the densest concentration of Jurassic dinosaur bones. In Wyoming, the Flaming Gorge National Recreation Area offers 91-mile-long reservoir with 500-foot cliffs. The route also passes through the Wind River Indian Reservation, home to the Eastern Shoshone and Northern Arapaho tribes. Local commerce includes art galleries in Pinedale and wild-rhubarb jams sold at farm stands in Big Piney.

• Zion National Park: 45-minute detour from St. George
• Cleveland-Lloyd Dinosaur Quarry: near Price, UT
• Flaming Gorge National Recreation Area: US-191, WY
• Wind River Indian Reservation: near Dubois
• Local products: Rocky Mountain honey, huckleberry jams, Native American crafts