The MTBDR is BDR’s 23rd route and completes the final link in the Western BDR system, creating a continuous backcountry network across the western United States. The approximately 900-mile route begins in Island Park, Idaho, and travels north through Montana before ending near the U.S.–Canada border outside of Eureka.

Crossing more than thirteen mountain ranges, the MTBDR takes riders deep into Big Sky Country, weaving together alpine ridgelines, remote valleys, dense pine forests, historic mining towns, wide-open ranchlands, and rugged two-track roads. Highlights include the Gravelly Range, Ruby River Valley, Virginia City, Butte, and the wild landscapes of the East Pioneer, Highland, and Cabinet Mountains.

Blending scenic gravel, flowing forest roads, and optional harder sections for more experienced riders, the MTBDR offers an ideal balance of accessibility and challenge. The route is best enjoyed between July and September, depending on snow levels and seasonal closures.

This route was made possible by the generous support of our Presenting Sponsors:  Triumph Motorcycles, onX Offroad, Quad Lock and Edelweiss Bike Travel.  BDR is also grateful for the continued support of our industry partners and the incredible riding community.