Jackass Butte
Peak · 7,224 ft · Yosemite corridor
Jackass Butte is a 7,224-foot peak in the Yosemite corridor of California's Sierra Nevada, sitting in terrain prone to wind and avalanche exposure. A technical approach point rather than a casual destination.
Wind accelerates through mid-afternoon as pressure gradients steepen; mornings are calmer. The peak's elevation and aspect funnels systems off the high country with little shelter. Expect 8 mph average but gusts to 19 mph on exposed ridges. Spring snowpack compounds the avalanche hazard on steeper approaches.
Over the last 30 days, Jackass Butte averaged a NoGo Score of 32.0, with temperatures hovering around 36 degrees Fahrenheit and an average wind speed of 8 mph. The lowest scores (6.0) occurred during stable high-pressure spells; peaks above 50 typically mark incoming systems. Crowding remains light at 3.0 on average. The week ahead continues this pattern of mixed conditions; plan for wind in the afternoon and avalanche reconnaissance before committing to steep terrain.
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About Jackass Butte
Jackass Butte sits in the high-Sierra terrain east of Yosemite Valley, accessed via Highway 120 from the west or Highway 395 from the east. The peak lies in avalanche terrain managed by the Sierra Avalanche Center. Most approaches involve hiking or climbing from trailheads near Tioga Pass or Tuolumne Meadows; these gateways are 60 to 90 minutes from Lee Vining or Groveland depending on season and road conditions. The location is remote enough that cellular coverage is unreliable and rescue response is slow. Winter and spring access requires understanding current snowpack and route-finding in corn or wind-scoured terrain.
Temperatures at Jackass Butte's 7,224-foot elevation swing from a 365-day low of 21 degrees Fahrenheit to a high of 53 degrees, with the 30-day average sitting at 36 degrees. Wind is the dominant feature; the 30-day average of 8 mph masks afternoon acceleration when systems push through the gaps. Maximum gusts reach 19 mph regularly. Crowding stays minimal year-round at a 3.0 average, partly because the peak requires technical scrambling or climbing and is not a marked tourist destination. Summer sees the lightest snow and shortest approach times but also the most unstable afternoon air masses. Late September to early October offers the best balance of stable high pressure, lower crowds, and passable snow.
Jackass Butte suits mountaineers and peak baggers comfortable with class 3 to 4 scrambling and avalanche terrain assessment. The approach is not suitable for families or day hikers without mountaineering experience. Visitors planning a trip should monitor snowpack depth and stability through the Sierra Avalanche Center, confirm Highway 120 and 395 access before departure, and start before dawn to avoid afternoon wind and lightning exposure. Parking near Tioga Pass or Tuolumne Meadows fills quickly during clear weekends; plan to arrive the day before or commit to a weekday push. Summer smoke from wildfires can reduce visibility and air quality for weeks; check current conditions before committing.
Nearby peaks in the Yosemite corridor include Cathedral Peak (10,911 ft, more technical), Mount Dana (13,053 ft, higher and more exposed), and Tenaya Peak (10,301 ft, similar elevation and wind pattern). Visitors often pair Jackass Butte with other high-Sierra summits on extended backpacking trips through the Tuolumne region. The Yosemite Valley floor 30 miles west is warmer, more sheltered, and far more crowded; Jackass Butte's appeal lies in its remote character and serious exposure. Water sources along most approaches are snowmelt-dependent in spring and early summer; carry a filter and plan accordingly.