Grey Butte
Peak · 11,364 ft · Yosemite corridor
Grey Butte is an 11,364-foot peak in the Yosemite corridor of the high Sierra. Exposed and wind-prone, it sits well above treeline in avalanche terrain.
Grey Butte faces sustained wind off the eastern Sierra; the 30-day average wind is 15 mph, with gusts to 33 mph common. Afternoon strengthening is the rule. Temperatures average 25 degrees Fahrenheit across the rolling month. Expect thin snowpack and exposed granite early season; mid-summer offers clearer rock but fiercer exposure to afternoon thermals.
Over the last 30 days, Grey Butte has averaged a NoGo Score of 31, with wind holding at 15 mph and temperature at 25 degrees Fahrenheit. The rolling score climbed from a low of 6 to a high of 50, driven by afternoon wind events. The week ahead will track similar patterns; plan morning-only ascents and watch for wind spikes in the afternoon window.
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About Grey Butte
Grey Butte crowns the Yosemite corridor northeast of Yosemite Valley, at 11,364 feet. The peak sits isolated on the eastern side of the high Sierra crest, well above the Lyell Canyon drainage. Access is primarily via Highway 120 from Lee Vining or from Tuolumne Meadows and the high country trails; drive time from the Valley is 2.5 to 3 hours via Tioga Pass. The peak is reachable as a scramble or short climb from the Lyell Canyon approach or cross-country travel from Gaylor Lakes, though navigation is critical and route-finding across talus is slow. Winter and spring approaches require avalanche awareness and likely snow-travel skills.
Weather on Grey Butte is dominated by exposure to the rain shadow wind stream that funnels down the eastern Sierra slope. The 30-day average wind of 15 mph masks strong afternoon acceleration; maximum gusts reach 33 mph regularly. Temperature averages 25 degrees Fahrenheit across the rolling month, with extremes from 11 degrees minimum to 40 degrees maximum across the year. Early season snow lingers into late spring, creating corniced ridges and unstable slab terrain; mid-summer brings rock scrambling conditions but fiercer solar loading and afternoon thunderstorms. Crowding averages 3 across the rolling month, reflecting the peak's remoteness and technical access. The rolling 30-day NoGo Score averaged 31; wind and exposure drive most unfavorable days.
Grey Butte suits experienced mountaineers and peak-baggers comfortable with scrambling, loose rock, and sustained wind exposure. Day trips from Tuolumne Meadows base are possible but require early departure; most visitors plan 1 to 2 days and camp in the high country. Bring wind-resistant layers, sun protection, and a reliable weather radio or summit check app; afternoon turnarounds are non-negotiable. Winter and spring require ice axe, crampons, and avalanche transceiver; slopes around the peak are steep and scoured by wind, but anchored snow can fail when loading changes. Summer hikers often pair Grey Butte with Gaylor Lakes or other high-country objectives to justify the approach time.
Grey Butte sits in close proximity to other high Sierra peaks of similar character: Lyell, Maclure, and the Cathedral Range summits all track similar wind exposure and snow persistence. Yosemite Valley and the lower Tioga Corridor offer milder conditions and easier access but lack the alpine isolation and sustained exposure Grey Butte delivers. Visitors comfortable with the Yosemite high country but seeking a less-crowded peak will find Grey Butte a logical target when seasonal snowpack recedes and afternoon wind remains the primary constraint.