Pumice Butte
Peak · 9,520 ft · Yosemite corridor
Pumice Butte is a 9,520-foot peak in the Yosemite corridor of California's Sierra Nevada. A high-elevation crag with avalanche terrain, it sits exposed to afternoon wind and sees light use year-round.
Pumice Butte faces west into the afternoon wind funnel off the eastern Sierra. Wind averages 8 mph but regularly spikes to 27 mph by mid-day. Morning hours are calmer; plan climbs and ridge traverses for dawn starts to avoid exposure.
The 30-day average wind of 8 mph masks volatile afternoon gusts and a mean temperature of 34 degrees Fahrenheit typical for high-elevation spring conditions. Expect highly variable conditions day to day; the rolling data shows scores swinging from 5 to 50 across the month. Watch for rapid temperature swings and wind ramp-up after 10 a.m., and assess avalanche terrain carefully given the seasonal snowpack.
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About Pumice Butte
Pumice Butte rises at 9,520 feet in the Yosemite corridor, roughly 8 miles northeast of Tenaya Lake via Highway 120. The peak sits on the high plateau east of the Tenaya drainage, accessible from the Tioga Road corridor near Tenaya Lake or from the Mono Basin approaches via the Inyo National Forest. Summer and early fall are the primary climbing windows; winter and spring require technical ice and snow skills and avalanche awareness. The peak itself is a scramble-class ascent in dry conditions but becomes a serious alpine objective when snow-covered.
Temperature at Pumice Butte averages 34 degrees Fahrenheit over the rolling 30-day period, with winter lows around 22 degrees and peak-season highs near 50 degrees. Wind averages 8 mph but regularly peaks at 27 mph, almost always in the afternoon as the lake basin heats and pressure rises. The peak sits in avalanche terrain; spring brings wet-slab hazard as snowpack settles and melt accelerates. Crowding averages 3 out of 10, reflecting low base popularity and limited approach routes. Late September through early October offers the most stable conditions; late spring and early summer see rapid snow retreat but lingering instability.
Pumice Butte suits experienced alpinists and peak-baggers comfortable with exposure and self-rescue. The low crowding score makes it an alternative to the popular Cathedral Range peaks to the south and the Tuolumne Meadows corridor to the west. Plan ascents for dawn or early morning to avoid afternoon wind. Carry layers for rapid temperature swings and assess snowpack stability with an eye toward the terrain; the SAC avalanche center covers this zone. Parking at Tenaya Lake or Tioga Road pullouts fills quickly on summer weekends; mid-week visits are less congested.
Nearby Tenaya Lake offers a lower-elevation alternative with calmer afternoon conditions once you drop below the exposed plateau. Mount Hoffman and Cathedral Peak to the south see more traffic but similar wind and temperature regimes. The Mono Basin rim peaks to the east are higher and colder. Pumice Butte's low base popularity and avalanche terrain make it a less-documented choice; approach research and recent trip reports are essential, especially in spring when snowpack state changes rapidly.