Diamond Peak (Lemhi Range) is most commonly climbed via the Little Fish Lake Creek — Southwest Ridge. Rated 5/10 difficulty, the standard ascent typically takes 1 day, covering roughly 12 miles with 3,500 feet of vertical gain. The summit stands at 12,202 ft with 5,377 ft of clean prominence — among the most topographically significant peaks in the lower 48.
Recommended Route
Little Fish Lake Creek — Southwest Ridge
Permits & Camping
Climbing Permits
No special climbing permit is required for Diamond Peak, though wilderness or park entry fees may apply. Peak season runs July-September.
Season & Access
Permit details pending editorial review
Safety Information
Technical Requirements
- Altitude Acclimatization
- Alpine Start
Known Hazards
- Altitude Sickness
- Hypothermia
- Extreme Wind & Weather
- Lightning Exposure
Getting There
location_on
Diamond Peak · ID
Coordinates
42.6106° N, 114.1364° W
Data source: PeakList.org (elevation, prominence); PeakBagger/SummitPost (route, class, hazards, permits)