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Lost River Range

Range Type

Mountain range with well-recognized name

Highest Point

Borah Peak (12,662 ft/3859 m)

Countries

United States

States/Provinces

Idaho

Area

1,873 sq mi / 4,851 sq km
Area may include lowland areas

Extent

79 mi / 128 km North-South
67 mi / 108 km East-West

Center Lat/Long

44° 6' N; 113° 31' W

Map Link

Microsoft 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.
Click Here for a Full Screen Map

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 Ranges	Level 4 (Parent)
Lost River Range	Level 5
Pahsimeroi Range	Level 6 (Child)
Central Lost River Range	Level 6 (Child)
Donkey Hills	Level 6 (Child)
Red Hills	Level 6 (Child)
Hawley Mountains	Level 6 (Child)
Southern Lost River Range	Level 6 (Child)
Lemhi Range	Level 5 (Sibling)

Major Peaks of the Lost River Range

Ten Highest Peaks
Rank	Peak Name	ft	m	Range6
1.	Borah Peak	12,662	3859	Central Lost River Range
2.	Leatherman Peak	12,228	3727	Central Lost River Range
3.	Mount Church	12,200+	3719+	Central Lost River Range
4.	Mount Breitenbach	12,140	3700	Central Lost River Range
5.	Lost River Mountain	12,078	3681	Central Lost River Range
6.	Mount Idaho	12,065	3677	Central Lost River Range
7.	Donaldson Peak	12,023	3665	Central Lost River Range
8.	USGS Peak	11,982	3652	Central Lost River Range
9.	No Regret Peak	11,972	3649	Central Lost River Range
10.	Peak 11967	11,967	3648	Central Lost River Range
Sub-peaks are excluded from this list. List may not be complete, since only summits in the PBC Database are included.

Child Range High Points
Rank	Peak Name	ft	m	Range6
1.	Borah Peak	12,662	3859	Central Lost River Range
2.	Dickey Peak	11,141	3396	Pahsimeroi Range
3.	South Lost River High Point	11,081	3377	Southern Lost River Range
4.	Hawley Mountain	9752	2972	Hawley Mountains
5.	Donkey Benchmark	9555	2912	Donkey Hills
6.	Taylor Mountain	8644	2635	Red Hills

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 Church Atop Williams Peak with Mount Church right at our backs (2021-07-04). Photo by Paul Lind. Click here for larger-size photo.
Mount Breitenbach View of the backside of Breitenbach from East Fk Pahsimeroi (2021-07-23). Photo by Paul Lind. Click here for larger-size photo.	Lost River Mountain Lost River Mountain and it's Super Gully in early June (2016-06-05). Photo by Sam Grant. Click here for larger-size photo.
Mount Idaho Nap Time on top of White Cap Peak. Mt. Idaho and Sacajawea and partial view of Borah in background (2016-07-02). Photo by Paul Lind. Click here for larger-size photo.	Donaldson Peak Church and Donaldson from Williams Pk (2021-07-04). Photo by Paul Lind. Click here for larger-size photo.
USGS Peak USGS Peak looking back from the Northern Ridge over near "Castle Peak" at the head of Upper Cedar Creek (2018-07-05). Photo by Paul Lind. Click here for larger-size photo.	Peak 11967 The "Chute" descending to the low saddle on the ridge between Mt Idaho and Pk 11,967 in Idaho's Lost River Range (2016-07-29). Photo by Paul Lind. Click here for larger-size photo.
Bad Rock Peak Doing a little exploring around the West Face of Bad Rock just below the summit approach through the chimney through the cliffs (out of view to the left) (2016-07-02). Photo by Paul Lind. Click here for larger-size photo.	Sacajawea Peak Nap Time on top of White Cap Peak. Mt. Idaho and Sacajawea and partial view of Borah in background (2016-07-02). Photo by Paul Lind. Click here for larger-size photo.

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