Buffalo, WY to Lolo, MT: Road Trip Guide

This east-west route from Buffalo, Wyoming to Lolo, Montana crosses the Bighorn Mountains and the heart of the northern Rockies. You'll travel along I-90 for most of the 430 miles, with an estimated driving time of 6 hours 30 minutes without stops. The route passes through historic towns, dramatic mountain passes, and wide-open rangeland.

One notable quirk: the climb up Powder River Pass on I-90 west of Buffalo reaches 9,666 feet, making it one of the highest interstate passes in the country. The pass often remains snow-free from May through October, but sudden summer storms are common.

The primary highways are I-90 and I-94 east of Billings, with a final leg on US-12 via Garrison and Lolo. Fuel is available in all major towns, but distances between stations can be significant, so plan ahead. Gas prices tend to be slightly lower in Montana than in Wyoming, but the difference is usually under $0.10 per gallon.

• Fuel stops: Buffalo, WY; Sheridan, WY; Billings, MT; Bozeman, MT; Missoula, MT.
• Road quality: Excellent on interstates; US-12 from Garrison to Lolo is a two-lane road with good pavement but occasional wildlife crossings.
• UNESCO World Heritage Sites: None directly on the route; the nearest is Yellowstone National Park, about 90 miles south of Bozeman via US-191.

Just west of Buffalo, the road begins a long ascent into the Bighorn National Forest. The scenery shifts from sagebrush prairie to dense pine forest and granite outcroppings. The Powder River Pass viewpoint offers a panorama of the Bighorn Basin.

Local commerce is rooted in ranching and mining. In Sheridan, the historic downtown features brick storefronts and a Western-themed main street. In Billings, the Yellowstone River runs through the city, and the Rimrocks (sandstone cliffs) provide a backdrop. As you approach Bozeman, the Bridger Range towers to the north, and the Gallatin Range to the south.

This region is also home to the Crow and Northern Cheyenne Indian reservations, whose cultural heritage is still visible in towns like Crow Agency, where the Battle of the Little Bighorn occurred. For hidden gems, consider a detour to Pompeys Pillar National Monument, about 30 miles east of Billings, which bears William Clark's signature from 1806.

Weather is the main safety concern. Winter driving can be hazardous, especially over mountain passes, and summer thunderstorms can bring hail and heavy rain. Always check road conditions before departure.

For family-friendly breaks, the Big Horn County Historical Museum in Hardin, MT, offers a walk-through pioneer village. For pets, most rest areas along I-90 have fenced dog runs, and motels in Bozeman and Missoula often welcome pets.

To manage fatigue, plan stops every two hours. The High Plains and mountain scenery can be monotonous at times; consider pulling over at scenic overlooks to stretch. The Highway 12 segment from Garrison to Lolo follows the Clark Fork River and has several pullouts.

For inspiration on unique stops, check how to find the best stops and hidden gems between cities.