Gardiner to Gillette: A Scenic Wyoming Road Trip Guide

The drive from Gardiner, Montana to Gillette, Wyoming covers roughly 450 miles along US-89 South and I-90 East, typically taking about 7 hours without extended stops. This route crosses the northern Rocky Mountains, the high plains of Wyoming, and passes near iconic landmarks like the Bighorn Canyon National Recreation Area, making it a journey rich in geological and historical contrasts.

Notably, the route passes through the site of the Battle of the Little Bighorn, a pivotal conflict in American history, adding a layer of cultural depth to the drive. With a mix of mountain passes, rolling grasslands, and energy industry towns, this trip offers diverse landscapes that shift dramatically as you travel south and east.

The route primarily follows US-89 South from Gardiner to I-90 East near Billings, Mt, then continues on I-90 through Wyoming. For the first segment, US-89 winds through Yellowstone National Park's northern entrance, requiring a park entrance fee: a private vehicle pass costs $35 and is valid for 7 days (as of 2025). After leaving the park at Mammoth Hot Springs, the road descends into Gardiner's gateway town, then crosses into Montana, following the Yellowstone River valley through Paradise Valley.

Fuel stops are critical: the longest stretch without services is between Greybull and Gillette, where gas stations may be sparse for over 100 miles. As of 2025, gas prices in Wyoming average around $3.20 per gallon, but in remote areas like Thermopolis, prices can be 10-15% higher. Budget for at least one fill-up outside major towns to avoid being stranded.

• Drive time without stops: 6.5-7 hours, depending on traffic and road works.
• Total distance: approximately 450 miles.
• Road conditions: well-maintained highways with occasional winter closures on US-89; I-90 is all-weather.

Road safety is generally high, but wildlife collisions are a risk, especially at dawn and dusk; watch for deer and elk along US-89 and I-90. The route is mostly rural, so rest areas are infrequent; plan stops in towns like Greybull and Buffalo to avoid drowsy driving. Family-friendly stops include the Bighorn Canyon visitor center, which offers interactive exhibits for kids, and the Wyoming Dinosaur Center with its 'Dig for a Day' program (parental supervision required). Pet-friendly frameworks vary: many roadside parks along I-90 have designated pet areas, and most national forest trails allow dogs on leashes; however, Yellowstone National Park restricts pets on trails, so plan accordingly.

Hidden off-route spots: Take the detour to Shell Falls (a 120-foot waterfall) just east of Greybull, or explore the Bighorn Medicine Wheel, an ancient Native American site perched at nearly 10,000 feet, a 20-mile drive from Lovell. For fatigue management, take advantage of the scenic overlooks every 20 miles on I-90, which offer safe pull-offs for stretching. Local commerce includes unique stops like the 'Maverick' restaurant in Gillette, known for its homemade pies.

Natural scenery dominates this route, from the geothermal features of Yellowstone to the red desert of the Bighorn Basin. The Bighorn Canyon National Recreation Area, accessible near Lovell, offers dramatic cliffs and boating opportunities, and is a prime spot for hiking. Climate conditions vary: summers are hot and dry, with highs above 90°F in the basin, while winters can be frigid, with sub-zero temps and snow, especially in the mountains. The aesthetics of the drive shift from alpine forests to sagebrush steppe, offering panoramic vistas at the 8,000-foot Powder River Pass.

Local commerce en route includes ranching towns like Buffalo, WY, which host rodeo events in summer and feature local artisan shops. The Wyoming Dinosaur Center in Thermopolis (founded in 1995) provides a cultural stop, showcasing excavated fossils from the region. Culinary infrastructure ranges from classic diners to steakhouse chains; notably, the historic Occidental Hotel in Buffalo offers a taste of Old West hospitality.

For those interested in how to find the best stops and hidden gems between cities, this route offers ample opportunities to deviate and explore.