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Lost River Range

Range TypeMountain range with well-recognized name
Highest PointBorah Peak (12,662 ft/3859 m)
CountriesUnited States
States/ProvincesIdaho
Area1,799 sq mi / 4,659 sq km
Area may include lowland areas
Extent79 mi / 128 km North-South
67 mi / 108 km East-West
Center Lat/Long44° 6' N; 113° 31' W
Map LinkMicrosoft Bing Map

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Description

The Lost River Range is a massive desert fault block range that holds the highest peaks in Idaho. Rising a vertical mile from the valleys on either side, the range is primitive and little explored. Most of the mountaineering and hiking interest in the Lost Rivers is focused on Borah Peak, high point of Idaho, leaving the rest of the range a parched wilderness of steep terrain, talus fields, and deep canyons.

Map of Lost River Range
Click on red triangle icons for links to other ranges.


Note: Range borders shown on map are an approximation and are not authoritative.
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Other Ranges: To go to pages for other ranges either click on the map above, or on range names in the hierarchy snapshot below, which show the parent, siblings, and children of the Lost River Range.
Lost River-Lemhi RangesLevel 4 (Parent)
         Lost River RangeLevel 5
         Lemhi RangeLevel 5 (Sibling)



Major Peaks of the Lost River Range

Ten Highest Peaks
RankPeak NameftmRange6
1.Borah Peak12,6623859 
2.Leatherman Peak12,2283727 
3.Mount Church12,200+3719+ 
4.Mount Breitenbach12,1403700 
5.Lost River Mountain12,0783681 
6.Mount Idaho12,0653677 
7.Donaldson Peak12,0233665 
8.USGS Peak11,9823652 
9.No Regret Peak11,9723649 
10.Peak 1196711,9673648 
Sub-peaks are excluded from this list. List may not be complete, since only summits in the PBC Database are included.



Photos of Peaks in the Lost River Range

Borah Peak

A view of the cleft forepeak along Borah's north ridge (1991-08-23).
Mount McCaleb
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On Mount McCaleb summit ridge looking east into the Lost Rivers, Idaho (2016-05-29). Photo by Paul Lind.
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Trinity Peak
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Trinity Pk in the Lost Rivers, Idaho. Photo taken from E Fk Christian Gulch on decent (2016-05-28). Photo by Paul Lind.
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Pahsimeroi Pyramid
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The Pahsimeroi Pyramid in the Lost River Range, Idaho. Photo taken from Metaxy Peak (2016-05-27). Photo by Paul Lind.
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