Main Oregon Trail Backcountry Byway

The Main Oregon Trail Backcountry Byway follows the route of the pioneers who journeyed through the Idaho desert. Spend the afternoon exploring historic Oregon Trail sites or visit Three Island Crossing State Park to see Conestoga replicas and learn about the emigrants who dared to take on one of the most challenging river crossings along the Oregon Trail and the Native Americans who mastered this difficult Idaho terrain.


102 miles
164.1 km

Time Icon


6 hours

When to Visit

Late Spring & Early Fall

31 Byways. 31 Ways to Be Inspired.

A variety of scenic, natural, historic, recreational, archeological and cultural experiences can be found on Idaho’s 31 scenic byways. View the video to get a taste of the adventures that await you, and start planning your next road trip.

Road Trip Tips

Turn-by-Turn Directions: Start at Glenns Ferry (exit 121 of I-84), 75 miles southeast of Boise.

Road Conditions: One-third of the route is paved roadway, two-thirds is gravel road.

Full services in: Glenns Ferry and Mountain Home.

Full services: When gas, food and lodging are available

Nearby Adventures

Get ready to take a trip back in time—explore historical sites and museums along the Main Oregon Trail Backcountry Byway.

Download Before You Hit the Road

Start planning your epic Idaho road trip with the help of these free travel publications.

Idaho Roadsider

State Highway Map

Travel Tips

Need some ideas for your next Idaho road trip? Check out these travel tips and start planning your adventure.

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