Mount Lemmon (Santa Catalina Mountains) is most commonly climbed via the Aspen Trail / Mount Lemmon Trail. Rated 4/10 difficulty, the standard ascent typically takes 1 day, covering roughly 10 miles with 2,800 feet of vertical gain. The summit stands at 9,157 ft with 5,157 ft of clean prominence — among the most topographically significant peaks in the lower 48.
Recommended Route
Aspen Trail / Mount Lemmon Trail
Permits & Camping
Climbing Permits
No special climbing permit is required for Mount Lemmon, though wilderness or park entry fees may apply. Peak season runs April-October.
Season & Access
Permit details pending editorial review
Safety Information
Technical Requirements
- Alpine Start
- Off-Trail Navigation
- Water Crossings
Known Hazards
- Dehydration
- Heat Exhaustion
- Lightning Exposure
- Bears & Wildlife
- Loose Rock & Scree
Getting There
location_on
Mount Lemmon · AZ
Coordinates
32.4433° N, 110.7882° W
Data source: PeakList.org (elevation, prominence); PeakBagger/SummitPost (route, class, hazards, permits)