Lost Trail Pass, Idaho & Montana

Bitterroot Valley Montana
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Lost Trail Pass

Located near the Continental Divide at over 7,000 feet, Lost Trail Pass cuts through the steep, rocky peaks of the Bitterroot Mountains on the Montana-Idaho border, at the southern end of the Bitterroot Valley along US-93.

  • Lost Trail Pass lies ½ mile west of the Continental Divide, on US-93. 
  • Enjoy winter fun at Lost Trail Powder Mountain Ski Area, located on top of the pass. 
  • Numerous hiking trails can be found in Bitterroot National Forest. 
  • Contact the Sula Ranger Station at (406) 821-3201 for information on the pass.


Lost Trail Pass lies at the south end of the Bitterroot Valley at 7,014 feet, along US Hwy 93, on the border between Montana and Idaho.

Driving Directions

Follow US-93 S through the Bitterroot Valley for roughly 84 miles.


From Hamilton, it takes about 45 minutes to reach the top of Lost Trail Pass.


  • Take in views of the Bitterroot Valley before ascending toward the pass amidst sheer, rocky cliffs and forested hills that fall away to the Salmon River below.
  • During summer, stop in at the visitor center located on top of the pass.
  • During winter months, ski the slopes from the top of the Continental Divide at Lost Trail Powder Mountain Ski Area.
  • Descend south into Idaho and visit Lemhi Country Museum in Salmon.
  • See historical landmarks visited by the famous duo, Lewis and Clark.