Foss Mountain

Elevation: 9,190 ft
Prominence: 210

Access and climbing information for this peak is found on page 307.


Foss Mountain, named by miners, sits west of the Lemhi Crest. A mining road leads from the valley nearly to the summit. It was in terrible shape for driving in 1981 and has likely deteriorated with the passing of time. The road provides trail-like access at a minimum for a high start if you are interested in reaching the main Lemhi crest between Bell Mountain and Diamond Peak. I drove nearly to the summit in 1980 and 1981 with a rugged Jeep CJ7. I doubt I would try it today.

Larry Prescott climbed the peak on an epic 13 mile, 7,300 foot gain, 6-peak day, which saw him traverse the connecting ridge from Peak 10681. See Larry’s trip report: Lemhi Enchainment, Little Sister to Foss Mountain.

Class 1 via the road. Class 2 from Peak 10681.

USGS Topo: Bell Mountain

Foss Mountain. Larry Prescott Photo

Foss Mountain. Larry Prescott photo.

Larry Prescott reported he shaved distance of his descent by dropping off this slope. Larry Prescott Photo

Larry Prescott reported he shaved distance of his descent by dropping off this slope. Larry Prescott photo.

Climber Trip Reports

Mountain Range: Lemhi Range

Year Climbed: 1980, 1981

Longitude: -113.18309   Latitude: 44.1929

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