Obelisk Lake Peak
Peak · 10,518 ft · Yosemite corridor
Obelisk Lake Peak rises to 10,518 feet in the Yosemite corridor of the Sierra Nevada, a steep alpine summit above its namesake lake. Wind and snowpack dominate conditions year-round.
Morning calm persists until late morning; wind typically rises by midday and funnels upslope off the lake through afternoon. Temperature swings 30+ degrees between sun and shade at this elevation. Snowpack stability requires assessment on winter and spring approaches.
The 30-day average wind of 9 mph masks volatile afternoons that spike to 30 mph in gusts. Temperature has averaged 27 degrees Fahrenheit over the last month; expect winter-grade conditions until late spring. The week ahead will show whether stability shifts as snowpack transitions.
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About Obelisk Lake Peak
Obelisk Lake Peak sits in the high Sierra east of Yosemite Valley, accessible via Highway 120 from the west or Highway 395 from the east. The peak stands above Obelisk Lake at roughly 10,500 feet elevation on the Sierra crest corridor. Most approaches ascend from the lake basin on steep scree and talus; summer climbers reach the summit in half a day from trailhead. Winter and spring access demands route-finding through avalanche terrain and potential cornicing on the final pitch. The nearest resupply is Mammoth Lakes to the east or Lee Vining; Yosemite Valley lies west beyond Tioga Pass.
Conditions at Obelisk Lake Peak shift radically with season and time of day. Wind averages 9 mph over the rolling 30 days but regularly exceeds 25 mph by afternoon, channeled by the lake basin and ridge exposure. Temperature has averaged 27 degrees Fahrenheit; overnight lows dip to 10 degrees or below in winter and early spring. Snowpack persists well into June in most years; wet-slab avalanche hazard peaks during afternoon warming cycles. Morning ascents avoid afternoon wind and cornice collapse; climbers who depart after 9 a.m. encounter deteriorating conditions and higher crowding on the descent.
Obelisk Lake Peak suits experienced Sierra climbers comfortable with loose rock, exposure, and self-rescue in remote terrain. Snowpack and avalanche awareness are mandatory April through June. Parties typically plan 6 to 8 hour round trips from the lake; turnoff decisions by noon are critical to avoid descent in darkness or severe wind. Crowding averages 3.0 on the NoGo scale, reflecting low base popularity and the peak's steepness; weekends draw slightly more traffic during stable-snow windows. Cell service is absent; emergency egress depends on route knowledge and daylight.
Visitors often pair Obelisk Lake Peak with traverses to neighboring summits or lake camping in the basin. The Yosemite corridor offers less technical alternatives at lower elevation (Cathedral Lakes, Tenaya Lake) for parties avoiding high altitude or avalanche terrain. High-wind afternoons redirect climbers to early starts or waiting for the next calm day; late-season parties benefit from reduced snowpack but face rockfall and exposure as snow melts off the upper pitch.