5.0 star · Extra Difficult Out and Back

Lost River Mountain

Salmon-Challis National Forest · Custer County, Idaho

Trail length

6.6 km

Time

~3 hrs 33 min

Elevation Gain

1340 m

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"An epic challenge to remember from the heart of Custer County"

The Lost River Mountain is a 6.6 km looped trail that starts and ends in , Custer County, Idaho. Based on our data, the trail is graded as Extra Difficult. For information on how we grade trails, please read measuring the difficulty of a hiking trail on hiiker. Also, check our latest community posts for trail updates.

This trail can be completed in approx 2 days. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.