Ruby Peak
Peak · 13,192 ft · Mammoth Lakes corridor
Ruby Peak sits at 13,192 feet in the Mammoth Lakes corridor, a high-Sierra summit exposed to afternoon wind and sustained by winter snowpack. Typically calmer in early morning.
Wind accelerates noticeably after 11 am, funneling off the eastern Sierra. Temperature drops sharply above 13,000 feet; expect 18 degrees on average across the 30-day window. Avalanche terrain demands snow-stability assessment in spring and early winter.
Over the last 30 days, Ruby Peak's average score has been 37, with temperatures averaging 18 degrees and wind at 13 mph; peaks have gusted to 39 mph. The week ahead will track similar patterns. Plan around early-morning calm windows and afternoon wind acceleration. Winter snow lingers into spring, so avalanche awareness is non-negotiable.
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About Ruby Peak
Ruby Peak anchors the eastern high country of the Mammoth Lakes corridor, at 13,192 feet on the ridge spine separating the Mono Basin from the Sierra's wet side. Primary access routes approach from the Mammoth Lakes gateway (Highway 395 south of the town) via trailheads on the eastern slope or from the western approach off Highway 120 near Tioga Pass. The peak sits roughly 8 miles northeast of Mammoth Mountain and commands views across Nevada to the Great Basin. Winter and spring require checking ESAC (Eastern Sierra Avalanche Center) forecasts before any approach.
Ruby Peak operates on a high-altitude climate with an average 30-day temperature of 18 degrees Fahrenheit and average wind of 13 mph, though gusts reach 39 mph regularly. Afternoon thermal wind is the dominant pattern; calm conditions pool in the first 2 to 3 hours after dawn. Spring brings instability in wind-loaded and south-facing snow; winter snowpack lingers well into late spring. Crowding averages 2.0 across the rolling month, meaning the peak sees sparse traffic and minimal parking pressure. Smoke from fires lower in the Sierra or on the Nevada side can close visibility for weeks in summer and fall.
Ruby Peak suits experienced alpine climbers and ski mountaineers with solid snow assessment and route-finding skill. The steep, exposed terrain and avalanche-prone gullies demand winter training and beacon literacy. Plan for a pre-dawn start to clear the peak before afternoon wind and exposure become overwhelming. Summer rock scrambles are faster than spring or winter ascents but expose loose talus and require caution on descent. Bring layers; temperature swings between sun and shade are extreme at this elevation.
Adjacent high peaks like Mammoth Mountain and the Ritter Range cluster nearby and offer alternative summit routes for off-days at Ruby Peak. The Mammoth Lakes area provides reliable logistics, lodging, and resupply. Wind and temperature on Ruby Peak exceed conditions at lower elevations in the corridor by a wide margin; expect sustained alpine harshness year-round.