Mono Jim Peak
Peak · 10,892 ft · Mammoth Lakes corridor
Mono Jim Peak is a 10,892-foot summit in the Mammoth Lakes corridor of California's Sierra Nevada. Sits in avalanche terrain with exposure to afternoon winds funnel off nearby Mono Lake.
Wind averages 13 mph but accelerates sharply mid-afternoon as thermal circulation off the lake intensifies. Morning hours are notably calmer. Exposed ridge position amplifies gusts; terrain traps wind in certain approaches. Cold persists year-round; expect temperature drops with elevation gain and wind chill.
Over the past 30 days, Mono Jim Peak averaged a NoGo Score of 37.0 with winds of 13 mph and temperatures near 25 degrees Fahrenheit; the max wind gust hit 41 mph. The week ahead will track similar patterns. Aim for early-morning ascents to beat afternoon wind buildup and peak crowding windows.
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About Mono Jim Peak
Mono Jim Peak stands in the high-elevation Mammoth Lakes corridor, accessible from U.S. Highway 395 north or south depending on your approach. The peak sits roughly 10 miles northeast of the town of Mammoth Lakes, in terrain that straddles the crest of the Sierra Nevada. Primary access routes approach from the east via Highway 395 or from the west via Highway 120 (seasonal, often closed in winter). Nearby landmarks include Mono Lake to the east and the Inyo National Forest to the south. The peak is relatively low-traffic compared to iconic neighbours; base popularity sits at 0.2, meaning crowds remain sparse even on busy weekends.
Winter and spring conditions dominate the experience. The 30-day average temperature of 25 degrees Fahrenheit reflects the deep-snow period; minimums in the annual data drop to 10 degrees, maximums reach 43 degrees in warmer months. Avalanche terrain is a critical consideration; slopes face multiple aspects and hold snow into late spring. The Eastern Sierra Avalanche Center (ESAC) covers this zone; check stability bulletins before any winter or early-spring approach. Wind averages 13 mph over 30 days but peaks at 41 mph, confirming afternoon acceleration is severe. Crowding averages 2.0 (light), so solitude is nearly guaranteed except immediately after road reopenings.
Mono Jim Peak suits experienced mountaineers comfortable with avalanche terrain and high-altitude wind exposure. This is not a beginner peak. Climbers should plan early-morning starts to exploit the calmer morning window; afternoon conditions become hostile by mid-day. Crampons, ice axes, and avalanche safety gear (beacon, shovel, probe) are mandatory in winter and spring. The exposed ridge magnifies wind chill; layer aggressively. Parking is minimal near trailheads; arrive very early or mid-week to avoid crowding around access points. Snowpack lingers well into summer at this elevation, locking the peak to experienced climbers through late spring.
The Mammoth Lakes corridor offers multiple high-Sierra alternatives within an hour's drive. Bloody Mountain (11,518 feet) sits southwest and is popular among ski mountaineers. Gibbs Peak and Carson Peak are accessible from slightly lower elevations. Mono Jim Peak's relative isolation and avalanche-terrain emphasis make it distinct; it rewards climbers seeking solitude and technical challenge over scenic popularity. Check ESAC forecasts and Highway 395 conditions before committing to a trip in winter or spring.