Missoula to Cheyenne: An Epic Road Trip Through the Northern Plains

This 700-mile route along I-90 and I-25 traverses the northern Rocky Mountains and high plains, offering a cross-section of Montana’s rugged beauty and Wyoming’s wide-open spaces. A notable quirk: just east of Sheridan, WY, the interstate briefly dips into a stunning canyon carved by the Tongue River—a surprise after hours of flat ranchland.

Driving time is approximately 10 to 11 hours without stops, but the journey demands at least one overnight for a meaningful experience. The route passes through Billings, MT, and Sheridan, WY, with Cheyenne as the final destination.

From the Bitterroot Valley to the Great Plains, the scenery shifts dramatically. Highlights include the pine forests of the Lolo National Forest and the badlands near Billings. Near Sheridan, the Bighorn Mountains offer a brief alpine detour.

Natural Landscapes & Attractions

• Pompeys Pillar National Monument (east of Billings): a sandstone butte with William Clark’s signature.
• Little Bighorn Battlefield National Monument (near Crow Agency): sobering history, excellent visitor center.
• Bighorn Canyon National Recreation Area (near Lovell, WY): dramatic cliffs and turquoise water.
• Medicine Wheel National Historic Landmark (Bighorn Mountains): an ancient stone circle.

Local Commerce & Culture

• Billings: the largest city on the route with Western art galleries and a historic downtown.
• Sheridan: charming Main Street with craft breweries and cowboy boot shops.
• Cheyenne: the state capital with the Cheyenne Frontier Days museum and the historic Plains Hotel.
• Detour to Cody, WY (2 hours west of Sheridan) for the Buffalo Bill Center of the West.

The primary route is I-90 east from Missoula to I-25 south near Buffalo, WY. Expect seamless interstates but limited services in remote stretches. Fuel stops are sparse between Billings and Sheridan, so plan accordingly.

Fuel and Route Economics

• Fuel cost: roughly $70-$90 for a typical sedan, based on $3.50/gal and 25 mpg.
• Gas stations cluster around major towns (Missoula, Butte, Bozeman, Billings, Sheridan, Casper).
• In remote areas, prices can be 10-15% higher; fill up in larger towns.
• Alternative fuels: limited EV charging; plan for Level 2 stops at hotels.

Road Quality and Safety

• I-90 in Montana is generally well-maintained, with sections of concrete and asphalt.
• Wyoming’s I-25 can have wind gusts exceeding 50 mph; check forecasts.
• Winter driving: snow and ice common from November to March; carry chains or winter tires.
• Cell service is sporadic east of Billings; download offline maps.

Long stretches demand proactive fatigue management. Plan breaks every 2 hours or at key rest areas. For families and pets, the route offers numerous safe, engaging stops.

Family and Child Suitability

• Pompeys Pillar: easy walk with a boardwalk; kids love the history.
• Little Bighorn: audio tour (45 min) keeps children engaged; Junior Ranger program.
• Bighorn Canyon: boating and hiking suitable for older children.
• Cheyenne: the Wyoming State Museum is free and interactive.

Pet-Friendly Framework

• Most national monuments allow leashed pets in outdoor areas.
• Rest stops along I-90 have designated pet areas; carry water.
• Hotels: chains like La Quinta and Motel 6 are pet-friendly; check fees.
• Veterinarians: available in Billings and Cheyenne (emergency clinics 24/7).

Fatigue Management & Rest Zones

• Rest areas: well-maintained every 30-50 miles on I-90 (e.g., Greycliff, Columbus).
• Consider an overnight stop in Sheridan (midpoint) for a full day’s rest.
• Power naps: use rest area parking lots; safety is good during daylight.
• Caffeine: last major coffee stop in Sheridan; after that, small towns have gas station coffee.

For more on uncovering the best stops along any route, see how to find the best stops and hidden gems between cities.