Butte to Thermopolis: Montana to Wyoming Road Trip Guide

Leaving Butte, Montana, you'll drive past the Berkeley Pit, a mile-wide former copper mine filled with toxic water—a stark reminder of the region's mining history. The route south follows I-90 east through the Deer Lodge Valley, then US-212 and US-310 across the Wyoming border, finally descending into Thermopolis via WY-120, a 500-mile journey taking 8–9 hours of driving time. This corridor bridges the Rocky Mountain foothills and the high plains, offering dramatic shifts in geology and culture.

To truly appreciate the diversity between these two towns, understanding how to find the best stops and hidden gems between cities will transform your trip from a simple drive into an adventure. The question "is it worth driving Butte, MT to Thermopolis, WY?" is answered by the abundance of hot springs, dinosaur fossils, and frontier history along the way.

Road quality is good on main highways but watch for wildlife: deer, elk, and pronghorn are common, especially at dawn and dusk. US-310 and US-14 have narrow shoulders; slow down in curves. In winter, carry chains or 4WD, especially over the Pryor Mountains (elevation 5,500 ft). Cell service is spotty between towns; download offline maps.

• Safety tips: Use daytime running lights, avoid night driving in remote sections, and watch for livestock on open range. Speed limits: 70 mph on I-90, 65 mph on two-lane highways.
• Emergency services: Dial 911. Closest hospitals: Billings (exit 446), Cody, and Thermopolis. Tow services available in major towns but may take 1+ hour in remote areas.

Family and Child Suitability

This route is excellent for families with children interested in dinosaurs, hot springs, and western history. The Wyoming Dinosaur Center in Thermopolis has interactive exhibits and a dig site where kids can uncover fossils. Hot Springs State Park offers a free public pool at 104°F. In Cody, the Old Trail Town has historic buildings and a gunfight reenactment. Recommended stops: Butte's Our Lady of the Rockies overlook, Columbus's Madison Buffalo Jump State Park (interpretive trail), and the Bighorn Canyon visitor center with junior ranger programs.

• Kid-friendly dining: Butte: Mac’s Last Stand for burgers; Cody: Wyoming's Rib & Chop House; Thermopolis: McDonald's (only fast food chain).
• Activities between towns: Geocaching along US-310, rock collecting in the Pryor Mountains (no permits needed for surface finds), and spotting wild horses in the Pryor Mountain Wild Horse Range.

Pet-Friendly Framework

Pets are welcome at most outdoor attractions but are not allowed in Yellowstone's boardwalks or inside museums. Hot Springs State Park allows leashed pets on trails but not in the pools. Motels in Butte, Cody, and Thermopolis generally accept pets for a fee ($10–$30/night). Recommended pet-friendly stops: Bighorn Canyon's Horseshoe Bend picnic area, and the Butte Silver Bow Creek Greenway (3-mile walking path). Always carry water and a bowl; summer temperatures can exceed 90°F in the Bighorn Basin.

For long drives, use rest areas (e.g., I-90 at mile 401 has fenced dog run). Avoid leaving pets in cars during sightseeing stops, as temperatures rise quickly even with windows cracked.

Hidden Off-Route Spots

Detour 10 miles west of Bridger, MT, to the ghost town of Gebo (abandoned coal mining camp) with eerie ruins and a cemetery. Near Cody, drive the Chief Joseph Scenic Highway (WY-296) for stunning views of the Absaroka Range. South of Thermopolis, visit the Legend Rock Petroglyph Site (30 miles west) with over 300 prehistoric rock carvings. These places require a gravel road, but offer solitude and unique photo opportunities.

Another hidden gem: The Hot Springs County Museum in Thermopolis houses a rare 1920s oil field exhibit and a one-of-a-kind collection of “cannonball” concretions. Check opening hours on weekends.

Fatigue Management & Rest Zones

Plan breaks every 2 hours or 100 miles. Key stopping points: Butte (departure), Columbus (1.5 hours), Bridger (2.5 hours), Lovell (3.5 hours), Cody (4.5 hours), and Thermopolis (destination). Use these towns for meals and stretching. In Yellowstone-adjacent seasons, traffic can add 1–2 hours, so factor in longer rest stops.

• Rest areas: I-90 has three well-maintained rest areas with restrooms and picnic tables. On US-310, there is a gravel pull-out near the Montana-Wyoming border with no services. In Wyoming, the Lovell rest area has water and vending machines.
• Napping spots: Designated rest areas are safe for short naps. Alternatively, pull into a truck stop (e.g., TA in Butte) or Walmart parking lot (Cody). Never park on the shoulder.

Infrastructure Safety & Road Quality

I-90 through Montana is a divided highway with standard reflectors and guardrails. US-212 from Laurel to Red Lodge is two lanes but well-paved; however, the Beartooth Highway (if taken) has steep grades and hairpin turns with no guardrails. US-310 is a narrow two-lane road with limited shoulders and occasional loose gravel. WY-120 south of Cody is smooth but can be covered with windblown sand. Overall, the route is safe for cautious drivers; use headlights in daytime on two-lane roads to increase visibility.

Construction zones: Summer months often bring road work on I-90, causing delays up to 20 minutes. Check Wyoming 511 and Montana 511 before departure.

The primary route uses I-90 East from Butte to Columbus, MT (37 miles), then US-212 South through the Beartooth Highway (seasonal) or, more commonly, US-310 South via Laurel and Bridger. Most travelers opt for the all-weather US-310 route through the Pryor Mountains. From Lovell, WY, take US-14 Alt to Cody, then US-20 and WY-120 to Thermopolis. Driving time is 8 hours without stops.

• Fuel stops: Butte, MT (exit 126); Columbus, MT (mile 408); Bridger, MT; Lovell, WY (every 60–80 miles). Fuel is cheapest in Montana due to lower taxes. Fill up in Butte or Columbus; Wyoming prices are slightly higher.
• Tolls: None on this route. Road conditions: I-90 is well-maintained; US-310 and WY-120 are two-lane highways with occasional cattle crossings. Check winter closures at pass levels.
• Rest areas: I-90 has rest stops at mile 401 (near Big Timber) and mile 434 (near Columbus). Wyoming has a rest area near Lovell on US-14. Otherwise, use gas stations or cafes.

Fuel Economics

For an average SUV (20 mpg), the 500-mile trip requires 25 gallons. At $3.50/gal in Montana and $3.80 in Wyoming, fuel cost ranges $87–$95. Budget extra if detouring through Yellowstone. Consider the "best stops Butte, MT to Thermopolis, WY" for fuel savings: but smaller towns like Bridger may have limited hours. Plan to fill when below half tank.

• Butte: Costco, Sam's Club for members; also stations at exit 126.
• Columbus: Main Street stations open 6am–10pm.
• Lovell: Two stations on US-14; one 24-hour.
• Cody: Multiple stations; cheapest near Walmart.

This route traverses four distinct ecoregions: the Deer Lodge Valley's ranchlands, the Beartooth Mountains (if taking the scenic highway), the Pryor Mountain desert, and the Bighorn Basin badlands. The transition from Montana's pine forests to Wyoming's sagebrush steppe is abrupt, with the change becoming visible south of Bridger. Near Lovell, the Bighorn Canyon National Recreation Area offers spectacular red cliffs and a vast reservoir carved through Precambrian rock. Heading south, the Wind River Canyon (US-20) between Thermopolis and Shoshoni is a narrow gorge with sheer walls exposing 2.9-billion-year-old granite—a geological wonder.

• Natural attractions: Beartooth Highway (if open June–Sep), Bighorn Canyon boat tours, Hot Springs State Park in Thermopolis (free state bathhouse).
• UNESCO sites: None directly on route, but Yellowstone National Park (a UNESCO World Heritage Site) is a 2-hour detour from Cody via US-14/16/20. The park's Grand Prismatic Spring and Old Faithful are iconic.
• Local commerce: Butte's Uptown district has antique shops and the World Museum of Mining. Cody, WY, features the Buffalo Bill Center of the West (five museums in one). Thermopolis offers the Wyoming Dinosaur Center with a working dig site.

Culinary Infrastructure

Dining options are sparse between towns. In Butte, try a pasty (Cornish meat pie) at the Butte Depot. In Columbus, the Beartooth Cafe serves hearty breakfasts. Bridger has a single diner (Bridger Café) with homemade pies. Lovell offers Café Bistro, and in Thermopolis, the Star Plunge's snack bar or the local pizza joint. For sit-down meals stick to Butte, Cody, and Thermopolis. Carry snacks and water for long stretches.

Unique food experiences: In Cody, the Irma Hotel's Buffalo Bill Bar serves prime rib. In Thermopolis, try bison burgers at the Paisley Shawl. For families, the fast-food options are limited to Subway and Dairy Queen in Thermopolis.