Aiguille Extra
Peak · 13,999 ft · Eastern Sierra corridor
Aiguille Extra is a 13,999-foot peak in the Eastern Sierra corridor, sitting above the glaciated terrain east of the Sierra crest. Exposed and windswept, it commands views across the high desert to Nevada.
Wind dominates here. The 30-day average is 12 mph, but afternoon funneling off surrounding ridges pushes gusts well above that. Morning hours are calmer. Exposed slopes face variable snow and ice; afternoon thermal turbulence shreds stability.
Over the past 30 days, Aiguille Extra averaged a NoGo Score of 37.0, with temperatures hovering around 16 degrees Fahrenheit and average wind at 12 mph. The week ahead follows spring patterns: expect warming afternoons and increasing wind by mid-day. Morning windows narrow as the season progresses.
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About Aiguille Extra
Aiguille Extra sits at 13,999 feet in the high Eastern Sierra, part of the remote crest country northeast of Mono Basin. Access is technical: approach via the Inyo National Forest backcountry from the east side, typically starting from Highway 395 near the June Lake area or via High Sierra passes. No maintained trail reaches the summit directly. Winter and early spring require avalanche awareness and solid mountaineering skills; the approach crosses active snow terrain and exposed ridges. Summer approaches are drier but still exposed. Gateway towns (Mammoth Lakes, June Lake) lie 30 to 45 minutes' drive south or north depending on your trailhead.
Winter and early spring dominate the climbing season here, though conditions are unforgiving. The 30-day average temperature of 16 degrees Fahrenheit reflects typical spring values at elevation; the rolling 365-day minimum of minus 2 degrees shows how cold the peak gets mid-winter. Wind is relentless. The 30-day average wind speed of 12 mph understates afternoon gusts; the 30-day maximum of 43 mph captures the exposure. Snow instability peaks in spring when solar loading and freeze-thaw cycles weaken the snowpack. Crowding stays minimal (average 2.0 on the scale), meaning solitude is almost guaranteed but self-reliance is mandatory.
Aiguille Extra suits experienced mountaineers comfortable with sustained exposure, snow climbing, and navigation in whiteout conditions. Solo travelers or small alpine parties are the norm. Plan for early morning starts to avoid afternoon wind and thermal turbulence. Descents in afternoon heat and wind are dangerous; many climbers summit before noon and move down before conditions deteriorate. Carry a shovel and understand slab propagation; the avalanche center is ESAC (Eastern Sierra Avalanche Center), and this peak is squarely in avalanche terrain. Weather windows are narrow; a stable high-pressure system lasting 3 to 4 days is prime climbing time.
Nearby peaks in the Eastern Sierra corridor include Mono Crags and the Matterhorn Peak area to the south, both more accessible and slightly lower. For climbers seeking similar elevation and technical terrain with marginally better accessibility, the Sierra crest near Kearsarge Pass offers comparable challenges with more established routes. Aiguille Extra's appeal lies in remoteness and true alpine character; expect to be the only party on the mountain most days.