Aperture Peak
Peak · 13,264 ft · Eastern Sierra corridor
Aperture Peak is a 13,264-foot summit in the Eastern Sierra, exposed to afternoon wind tunnels funneling off the high lakes. Winter approach requires avalanche awareness.
Wind accelerates here by mid-afternoon, averaging 12 mph over the last month with gusts to 46 mph. Morning calm is the rule; afternoon exposure is the risk. Snowpack stability dictates access more than season.
The 30-day average wind of 12 mph and temperature of 19 degrees Fahrenheit place Aperture Peak in classic Eastern Sierra spring shoulder conditions. The week ahead will show how quickly afternoon thermals and pressure funnels from the adjacent high basin reassert themselves after calm dawns.
30 days back / 7 days forward
Today's score by factor
About Aperture Peak
Aperture Peak sits at 13,264 feet in the Eastern Sierra's high corridor, roughly equidistant from Highway 395 approach routes via Rock Creek and Tungsten Canyon access. The peak sits in avalanche terrain managed by ESAC (Eastern Sierra Avalanche Center). Primary access is a backcountry approach requiring winter mountaineering skill and snowpack assessment in the cooler months. Base popularity is low, meaning crowds are minimal and approach routes remain relatively undocumented. Summer approaches via scramble routes are possible once snowpack retreats, typically late summer into early autumn.
The peak experiences cold average temperatures around 19 degrees Fahrenheit over the rolling 30-day window, with the 365-day record spanning 5 degrees to 32 degrees Fahrenheit. Wind averages 12 mph but routinely spikes to 46 mph, driven by pressure gradients between the Sierra crest and the desert basin to the east. Morning conditions are markedly calmer than afternoon; wind typically accelerates between 11 a.m. and 4 p.m. as the sun heats the lower elevations. Crowding averages 2 out of 10, reflecting the technical commitment required and the lack of trail infrastructure.
Aperture Peak suits experienced mountaineers and ski mountaineers comfortable with avalanche assessment and exposed ridges. Winter access demands current avalanche forecasts and a solid understanding of slab propagation on steep terrain. Summer scramble routes attract peak-baggers with good rock sense and comfort on steep talus. Spring and autumn are transition seasons where snowpack stability and wind patterns shift rapidly. Experienced parties plan approaches for early morning departure, avoiding the afternoon wind window. Solitude is the baseline; plan to encounter zero to one other party.
The peak sits within the Eastern Sierra's high-altitude corridor alongside other 13,000-foot summits accessed via Rock Creek and Tungsten Canyon drainages. Nearby Highway 395 gateways include Mammoth Lakes to the south and June Lake to the north, both offering weather updates and resupply. Avalanche terrain exposure distinguishes Aperture Peak from lower, non-technical summits; check ESAC forecasts before any winter or spring approach. The 30-day average NoGo Score of 37 indicates mixed conditions; wind and snowpack stability drive usability more than temperature or crowd pressure.