Headley Peak
Peak · 12,657 ft · Eastern Sierra corridor
Headley Peak rises to 12,657 feet in California's Eastern Sierra, a high alpine summit exposed to substantial afternoon winds. Approach only in settled morning conditions.
Wind accelerates through midday, consistently reaching 15 mph average with gusts to 45 mph by afternoon. Exposure is total on the peak itself. Morning calm windows close by late morning; afternoon descent is significantly windier than ascent.
Over the past 30 days, Headley Peak averaged 36 on the NoGo Score with temperatures around 30 degrees and average wind of 15 mph. The week ahead will show typical spring volatility; plan for morning starts and early descents, watching for wind spikes that can spike gusts well above the 30-day average.
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About Headley Peak
Headley Peak sits at 12,657 feet in the Eastern Sierra corridor, northeast of the Bishop area and accessible via Highway 395. The peak sits in avalanche terrain managed by the Eastern Sierra Avalanche Center (ESAC). Base popularity is low, meaning the approach sees minimal foot traffic compared to nearby Inyo County summits. Most ascents begin from trailheads on the eastern slope, requiring a drive from Bishop or Mammoth Lakes. The peak is a true high-alpine destination, not a casual day hike.
Winter and spring snowpack dominates conditions from late December through early June. The 30-day rolling average temperature of 30 degrees reflects early-season alpine weather with persistent snow at summit elevation. Wind averages 15 mph but regularly spikes to 45 mph, particularly in afternoon hours when thermal flows strengthen. Crowding scores average just 2 out of 10, indicating the peak remains relatively solitary. Late September through early November offers the most stable conditions, with warming temperatures and lower wind variability compared to spring turnover.
Headley Peak is suited for experienced alpine and mountaineering visitors comfortable with exposed ridges, avalanche terrain assessment, and rapidly deteriorating afternoon conditions. Plan all summit attempts for early morning departure and mid-morning summit arrival, with descent underway by early afternoon. Afternoon wind gusts of 45 mph or higher create cornicing risk and sloe-angle instability on snow. Parties should carry avalanche rescue gear and understand ESAC forecasts before committing. The low base popularity means minimal established infrastructure; self-sufficiency is essential.
Nearby peaks in the Eastern Sierra corridor include Mount Tom and Crater Mountain to the south, both offering similar exposure and avalanche terrain. Crowding remains minimal across the corridor; the trade-off is isolation if weather deteriorates rapidly. Late September ascents avoid spring snowpack and wind extremes, making that window the most predictable for non-mountaineering visitors. Check ESAC avalanche forecasts and Highway 395 road conditions before driving from Bishop.