Lost River Mountain

The Lost River Mountain is a 6.6 km trail that starts in , Custer County, Idaho. Based on our data, the hike 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 hike can be completed in approx 3 hrs 34 mins. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.