The Three Chimneys
Peak · 9,881 ft · Yosemite corridor
The Three Chimneys is a 9,881-foot peak in the high Sierra, sitting in the Yosemite corridor east of the Sierra crest. Winter and spring access demands avalanche awareness; melt season brings exposure and exposure to afternoon wind.
Wind averages 8 mph but ramps sharply in afternoon hours, funneling off the ridgeline and adjacent slopes. Spring snowpack remains unstable; cornices form and fracture on lee aspects. Early morning offers the calmest conditions; afternoon approaches are risky.
Over the last 30 days, the average wind has held at 8 mph with peaks near 28 mph, while temperatures averaged 32 degrees Fahrenheit and crowding stayed minimal at 3 out of 10. Conditions ahead mirror late spring patterns: rising temperatures, increased afternoon wind, and brief windows of passable snow. Check avalanche forecasts and wind trends before committing to an overnight push.
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About The Three Chimneys
The Three Chimneys sits in the high Sierra backcountry of the Yosemite corridor, 9,881 feet above sea level on the eastern flank of the crest. Access typically routes via Highway 120 from Lee Vining or from Tioga Pass trailheads; approach time varies from 6 to 8 hours depending on snow cover and chosen route. The peak marks the boundary between Mono Basin exposure and the Sierra's main water-shedding slopes. Late-season access (after Highway 120 reopens) is more reliable than early-season attempts, which demand avalanche terrain expertise and stable snowpack forecasts.
Spring conditions at The Three Chimneys span 30 days of moderate instability. Average temperatures of 32 degrees Fahrenheit mask wide swings: overnight lows near 17 degrees freeze corn, while afternoons approach 46 degrees Fahrenheit and trigger wet-slab activity on sun-facing gullies. Wind averages 8 mph but accelerates to 28 mph in afternoon gusts; exposed ridge sections become untenable by 2 p.m. Crowding remains low (3 out of 10), but that reflects the technical barrier and hazard profile, not preference. Early morning ascents (before 9 a.m.) capture the stillest air and strongest snow; descents after 11 a.m. risk slopping corn and gust exposure.
The Three Chimneys suits parties with alpine ski or mountaineering skill and avalanche certification. Plan for bivouac at or near the peak; day trips from trailheads are unreliable given distance and early-afternoon wind. Parties must carry avalanche rescue gear, assess slope aspect and snowpack daily, and be prepared to retreat if the forecast deteriorates. Afternoon wind makes exposed sections dangerous; camps placed in gulches or behind ridgelines offer protection. Water sources are snow-dependent; in melt season, snowmelt runs are reliable but cold.
Nearby alternatives include peaks south along the crest, which offer similar elevation and avalanche terrain but slightly lower exposure to Mono Basin wind. The Cathedral Range to the west provides access from lower elevations with shorter approach times but more vegetation and lower reliably skiable terrain. Compare The Three Chimneys' high-elevation exposure and minimal crowds to busier alternatives in the Yosemite high country; solitude comes with avalanche responsibility.