Idaho Falls to Missoula Road Trip Guide: Scenic Drive

The drive from Idaho Falls, Idaho to Missoula, Montana covers approximately 325 miles along US-20, I-15, and US-93, taking about 5.5 hours without stops. This route crosses the Continental Divide at Monida Pass (6,870 ft), marking a shift from the Snake River Plain to the Rocky Mountain forests. The historic stagecoach route once used by the Mullan Road connects two distinct regions.

How long to drive Idaho Falls, ID to Missoula, MT? The non-stop drive is roughly 5.5 hours, but plan for 7-8 hours with stops to enjoy the best stops. Fuel stations are sparse between Dubois and Dillon, so fill up in Idaho Falls or St. Anthony.

• Best gas station: Sinclair in Dubois (US-20), open 24/7.
• Road conditions: I-15 is well-maintained; US-20 has two lanes with passing opportunities.
• Speed limits: 80 mph on I-15 in Montana, 65 mph on US-20 in Idaho.

Telecom coverage: AT&T and Verizon work in towns; gaps in the Centennial Valley. Download offline maps.

Things to do between Idaho Falls, ID and Missoula, MT include exploring lava fields, hot springs, and ghost towns. The route passes through the Caribou-Targhee National Forest and the Beaverhead Mountains.

• Natural attractions: Cave Falls (near Ashton), Clark Canyon Reservoir (Dillon), Lost Trail Pass.
• UNESCO sites nearby: None directly on route; closest is Yellowstone (2h detour).
• Local commerce: Visit the Grant-Kohrs Ranch (Deer Lodge), a preserved cattle ranch.

For hidden gems, stop at the Earthquake Lake Visitor Center (US-287) to see the 1959 quake aftermath.

Culinary infrastructure: Best diner is the Classic Café in Dillon for steak; in Missoula, the Tamarack Brewing Company offers local beer. For a picnic, grab groceries at the Albertsons in Idaho Falls.

Is it worth driving Idaho Falls, ID to Missoula, MT? Absolutely, with proper planning. Wildlife (deer, elk) is common at dawn/dusk, especially near the Centennial Valley. Use high beams on rural roads.

• Family suitability: Stop at the Idaho Falls Zoo ($9 adult), the Museum of the Rockies in Missoula (dinosaur fossils).
• Pet-friendly framework: Most motels (Super 8, La Quinta) accept pets; hiking trails at Lolo National Forest allow dogs.
• Fatigue management: Rest at the Dubois Rest Area (I-15 milepost 160) or the Big Hole Battlefield.
• Infrastructure safety: Roads are well-paved; winter requires snow tires (October to April).

Local culture: Visit the Sacajawea Center in Salmon (25 mi detour) or the Bannack State Park ghost town. For dive bars, try the Buckhorn Bar in Dillon.

To find more unique stops, check out how to find the best stops and hidden gems between cities.