Rohn Pass
Peak · 11,259 ft · Mammoth Lakes corridor
Rohn Pass is an 11,259-foot peak in the Mammoth Lakes corridor of California's Sierra Nevada. Winter and spring ascents cross avalanche terrain and demand snowpack assessment.
Wind accelerates through the pass in afternoon hours, averaging 15 mph over the last 30 days with gusts to 43 mph. Early morning calm gives way to sustained flow off the surrounding high country. Expect whiteout conditions in active snowfall.
Over the past 30 days, Rohn Pass averaged a NoGo Score of 36.0 with temperatures around 23 degrees Fahrenheit and average wind of 15 mph. The week ahead will likely see variable crowding and wind; plan your ascent for calm mornings and monitor avalanche conditions closely given the exposed terrain above 11,000 feet.
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About Rohn Pass
Rohn Pass sits on the eastern flank of the Mammoth Lakes corridor, accessible via Highway 395 from Mammoth Lakes village. The standard approach follows drainages and snow gullies from the Mammoth Lakes Basin trailheads. Winter ascents require snowshoes or crampons; spring corn snow softens by mid-morning. The pass itself forms a natural saddle between peaks; traffic is light relative to better-known passes like Kearsarge or Shepherd, making it a destination for experienced winter climbers and ski mountaineers seeking solitude.
The site sits at 11,259 feet, placing it in the wind-accelerated transition zone where Sierra ridgeline weather dominates. Average temperatures over the last 30 days held at 23 degrees Fahrenheit, with recorded lows near 10 degrees and highs reaching 36 degrees across the rolling year. Wind averages 15 mph but peaks regularly at 43 mph; afternoon flows are nearly always stronger than morning conditions. Crowding remains minimal (averaging 2.0 over 30 days), with heaviest use occurring in late spring after snow stability improves and Highway 120 opens. Snow persists into early summer; by late July the pass is typically bare.
Rohn Pass suits experienced mountaineers and ski tourers comfortable with avalanche terrain assessment and self-rescue. Winter approaches demand knowledge of slab instability, wind-loading patterns, and whiteout navigation. Many parties pair a Rohn Pass ascent with nearby peaks in the Ritter Range; the route is rarely crowded enough to require early-morning parking jockeying. Skip afternoon climbs; wind gusts and deteriorating visibility make descent hazardous. Carry a shovel, probe, and beacon. ESAC avalanche advisories should inform timing decisions, especially in the 4 to 8 weeks following major storms when slab conditions persist.
The Mammoth Lakes corridor offers multiple high-altitude objectives within close proximity. Rohn Pass sits north of the more popular Banner Peak and Mount Ritter area, and south of the Sawtooth Range. Parties seeking lower-elevation alternatives with similar exposure to wind but less avalanche terrain will find Walker Lake or the eastern shore of Convict Lake more forgiving. Rohn Pass's defining draw is remoteness and technical terrain; it rewards careful planning and punishes casual approach.