Twin Peaks-East Peak
Peak · 12,240 ft · Yosemite corridor
Twin Peaks-East Peak rises to 12240 feet in the Yosemite corridor of the Sierra Nevada. A high-elevation peak with avalanche terrain, it demands winter caution and calm-weather planning.
Wind averages 15 mph across the 30-day window and funnels hard in afternoon hours. Temperature lingers near 21 degrees Fahrenheit on average, with afternoon gusts pushing toward 42 mph. Morning ascents catch calmer air; afternoon descent risk rises sharply.
The 30-day rolling average wind of 15 mph and average score of 34 reflect the peak's exposed high-Sierra character. Winter snowpack persists through late spring, and avalanche terrain requires current stability assessment before any approach. Watch the 7-day forecast for wind spikes above 30 mph and temperature swings that signal instability.
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About Twin Peaks-East Peak
Twin Peaks-East Peak sits at 12240 feet in the Yosemite corridor, accessible from Highway 120 via the Tioga Pass gateway or from the west side of Yosemite National Park. The peak lies in avalanche terrain tracked by the SAC (Sierra Avalanche Center); winter and early-spring ascents require current stability reports and slope-aspect awareness. Base popularity is low, meaning solitude is reliable but rescue response is slow. Most approaches begin from lower elevations on the east or west side of the Sierra crest.
Conditions at this elevation run harsh. The 30-day average temperature of 21 degrees Fahrenheit and 30-day average wind of 15 mph typify spring conditions on the high Sierra. Maximum wind in the rolling 30-day window reached 42 mph, and temperature ranges from 7 degrees Fahrenheit (annual minimum) to 34 degrees Fahrenheit (annual maximum). Afternoon wind is the rule above 11000 feet; morning ascents avoid the worst exposure. Crowding averages 3 (very light) across the month, reflecting limited access and high snow cover.
Twin Peaks-East Peak suits experienced mountaineers with avalanche training and mountaineering skills. Winter and spring visitors must carry ice axes, crampons, and probe-and-shovel rescue kits. Afternoon descent in warming snow or high wind is a primary hazard. Plan for early starts (dawn departure) and conservative turnaround times tied to wind and temperature rather than clock time. Parking at trailheads near Highway 120 is limited and may be impassable during heavy snow.
Nearby peaks in the Yosemite corridor offer similar exposure and seasonal patterns. Lower-elevation summits in the park proper (below 10000 feet) run calmer and warmer, with earlier seasonal access. East-side peaks accessed from Highway 395 often sit in rain shadow and experience drier conditions. Twin Peaks-East Peak is best paired with late-spring or early-fall ascents when snowpack is minimal and afternoon winds are more predictable.