Ellensburg to Choteau: A Scenic Road Trip Guide

Driving from Ellensburg, WA to Choteau, MT covers 520 miles and typically takes 9 hours without stops, crossing the Cascade Range, the Columbia River, and the Continental Divide.

The route uses Interstate 90 east to Bozeman, then north on US-287, ending in the shadow of the Rocky Mountain Front.

Interstate 90 is a well-maintained freeway with frequent rest areas and services. East of Bozeman, US-287 is a two-lane highway with towns spaced 30-50 miles apart.

Fuel economy: with an average 25 mpg, you'll need about 21 gallons. Across WA, ID, and MT, gas prices vary; budget around $70-90 total, depending on fuel prices.

Learn how to find the best stops and hidden gems between cities.

• Key highways: I-90, US-287
• Estimated drive time: 8-9 hours non-stop
• Major towns en route: Moses Lake, Spokane, Coeur d'Alene, Missoula, Butte, Bozeman
• Road quality: good on I-90; two-lane with moderate traffic on US-287

Weather: east of the Cascades, summers are hot and dry; winters bring snow and ice, especially over mountain passes. Carry chains in winter and check forecasts.

Road hazards: wildlife (deer, elk) are common at dawn and dusk, especially on US-287. Maintain vigilant driving and use high beams when safe.

Rest zones: every 100 miles or so, use rest areas or town parks to stretch. In Butte, the pit stop at the Berkeley Pit overlook offers a unique view of reclaimed mining land.

Family-friendly: the Silverwood Theme Park near Coeur d'Alene is a fun detour, though it adds time. Alternatively, the Montana Grizzly Encounter near Bozeman educates kids about bears.

Pet-friendly: many motels along I-90 accept pets; always call ahead. For breaks, rest areas have grass areas for dogs, but always leash them.

The route slices through diverse geology: the channeled scablands of eastern Washington, the Bitterroot Range, and the continental divide at Homestake Pass (elev. 6,329 ft).

Glacier National Park, a UNESCO World Heritage Site, sits about 100 miles northwest of Choteau. While it's a detour, the park's alpine scenery is a draw for many road-trippers.

Local culture thrives in small towns like St. Regis and Drummond, where diners serve classic American fare. In Choteau, the Old Trail Museum showcases local paleontology with dinosaur fossils from the Two Medicine Formation.