Lava Hot Springs to Choteau: Idaho-Montana Road Trip Guide

The drive from Lava Hot Springs, ID to Choteau, MT spans about 400 miles and can be completed in roughly 6.5 hours without stops. This route crosses the Continental Divide and passes through varied landscapes, from volcanic hot springs to the Rocky Mountain Front. The journey is punctuated by small towns, historic sites, and dramatic scenery, making it a rewarding road trip.

Starting in Lava Hot Springs, you'll head east on US-30, then north on I-15, passing through Idaho Falls and into Montana. The route takes you past the western edge of Yellowstone National Park, though not through it, and offers a mix of interstate and two-lane highways. The final stretch from Great Falls to Choteau follows US-89, a scenic byway known for its views of the Rocky Mountain Front.

Winter travel can be hazardous, especially over the Continental Divide near Butte. Check weather forecasts and carry chains if traveling between November and March. Summer thunderstorms can produce sudden downpours, reducing visibility.

For families, the Idaho Falls Zoo is a compact, affordable option. In Great Falls, the Lewis and Clark National Historic Trail Interpretive Center offers interactive exhibits about the explorers. For a break, the state park at Missouri Headwaters has short nature trails.

Pets are welcome at many rest areas and parks, but leash laws apply. Keep a water bowl in your car; temperatures can exceed 90°F in summer.

To combat fatigue, plan to stop every two hours. The town of Dillon, MT, has a family-run café known for its pies. A longer stop at Helena's Spring Meadow Lake State Park provides a shaded picnic area and a walking loop.

The landscapes range from the sagebrush plains of eastern Idaho to the pine forests of Montana. As you approach the Rocky Mountain Front near Choteau, the terrain becomes dominated by dramatic limestone cliffs and grassy plains. The region is home to the Rocky Mountain Front, a key habitat for grizzly bears and other wildlife.

In Lava Hot Springs, you can soak in the geothermal pools that have made the town famous. Further north, the town of Lima, MT, offers a glimpse of rural life with its grain elevators and old railroad depot.

Cultural stops include the Museum of the Rockies in Bozeman, but if you're pressed for time, consider the free exhibits at the Montana Historical Society in Helena. Local cuisine in Idaho Falls features huckleberry shakes, while in Great Falls, you can try a pasty, a mining-inspired meat pie. In Choteau, the local diner serves bison burgers sourced from nearby ranches.

UNESCO World Heritage Sites are not directly on this route, but the nearby Yellowstone National Park, though not visited, is a reminder of the region's geological significance.

Major highways include I-15 and US-89. Expect smooth pavement on interstates, but be prepared for occasional construction delays, especially near Butte. Fuel is plentiful along I-15, but once you leave Great Falls, stations become sparse; fill up before heading to Choteau.

• Average gas price: $3.50/gallon (May 2025).
• Estimated fuel cost for a typical sedan: $45.
• No tolls on this route.
• Consider downloading offline maps for areas without cell service, particularly around Helena National Forest.

For those interested in how to find the best stops and hidden gems between cities, this drive offers plenty of opportunities to veer off the main path. A notable detour is the town of Virginia City, a preserved gold rush town, just 30 miles off I-15 near the Montana/Idaho border.

Rest areas are located at regular intervals on I-15, including a major one near Spencer, ID, and another just north of Butte. These have restroom facilities and picnic areas, but limited vending options.