La Grande to Choteau: A 640-Mile Road Trip Guide

This route follows the old Oregon Trail, crossing the Blue Mountains and the Continental Divide, with a total driving distance of about 640 miles. You'll pass through the high desert of eastern Oregon, the Snake River Plain, and the Rocky Mountain foothills.

Most travelers complete the drive in 10-11 hours of pure driving time, but the journey offers rich rewards for those who linger. The elevation changes from 2,700 feet in La Grande to over 7,000 feet at some passes, shaping both climate and scenery.

Interstate 84 East from La Grande to Boise, then I-15 North through Idaho into Montana, and finally US-89 to Choteau. Gas stations are plentiful along interstates, but after leaving I-15 at Dillon, MT, fuel becomes sparse for about 70 miles until Choteau.

• Fuel costs average $3.50/gallon in Oregon, $3.30 in Idaho, and $3.20 in Montana.
• Public rest areas are located every 50-60 miles on I-84 and I-15.
• Cell coverage is mostly reliable on interstates, but drops in mountain passes.

Road quality is generally excellent, with well-maintained asphalt and clear signage. In winter, mountain passes like Cabbage Hill near La Grande require tire chains or all-wheel drive.

For a detailed approach to discovering unique stops, see how to find the best stops and hidden gems between cities.

Both interstates have wide shoulders and guardrails, but wildlife like deer and elk can create hazards near river valleys. Speed limits are 75 mph in Oregon and Idaho, 80 mph in Montana.

For children, ideal stops include the Discovery Center in Idaho Falls and the Museum of the Rockies in Bozeman, MT, though it's a slight detour.

Most roadside restaurants and hotels are pet-friendly, but national parks have restrictions. Numerous rest areas with picnic tables and walking paths make it easy to stretch legs.

To prevent fatigue, plan stops every two hours; notable towns for breaks include Mountain Home, ID, and Butte, MT.

The route showcases dramatic transitions: from pine forests of the Blue Mountains to the arid Snake River Plain, then to the grassy plains and Rocky Mountain foothills of Montana. The Yellowstone National Park, a UNESCO World Heritage Site, is a major detour off I-15 near West Yellowstone.

Local commerce thrives in small towns like Baker City, OR, and Idaho Falls, ID, offering artisan goods and farm-to-table dining.

In Baker City, visit the Oregon Trail Interpretive Center. In Arco, ID, check out the Craters of the Moon National Monument, a volcanic landscape unlike any other.

Hidden off-route spots include Leslie Gulch in Oregon, with its towering rock formations, and the Gold Bug Hot Springs near Salmon, ID.