Agassiz
Peak · 9,967 ft · Lake Tahoe corridor
Agassiz is a 9,967-foot Sierra Nevada peak in the Lake Tahoe corridor, sitting above glacial terrain with consistent afternoon wind. Winter approach requires avalanche awareness and stable snowpack assessment.
Wind averages 11 mph over 30 days, with gusts to 30 mph by afternoon. Mornings hold the calmest window. Temperatures hover around 28 degrees Fahrenheit in rolling periods. Avalanche terrain dominates the approach; spring warming and cornices demand caution. Crowding stays light.
Over the past 30 days, Agassiz has averaged a NoGo Score of 43, with wind running 11 mph and temperatures at 28 degrees Fahrenheit. The low score of 5 and high of 65 signal that conditions swing sharply with weather systems. The week ahead will track that variability; plan morning ascents and watch for afternoon wind loading and thermal instability on snow slopes.
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About Agassiz
Agassiz sits at 9,967 feet in the high Sierra Nevada, due south of Lake Tahoe in the Tahoe corridor. Primary access runs via Highway 50 from the west or Highway 89 from the north, with trailheads typically approached from the Tahoe Basin side. The peak is rarely climbed as a standalone destination; most parties encounter it as part of ridge traverses or cross-Sierra ski touring. The base elevation of the Lake Tahoe area provides a long approach, making this an all-day or overnight undertaking. Parking at major trailheads fills quickly on weekends, especially in spring.
Winter and spring conditions dominate the climbing season here. The rolling 30-day average temperature of 28 degrees Fahrenheit reflects late-season stability mixed with warming cycles. Wind averaged 11 mph over the past month, but afternoon gusts exceed 30 mph regularly; plan to start before dawn and summit before noon. Avalanche terrain is extensive. The peak sits in the Sacramento Avalanche Center forecast zone; corn and wet-slab instability spike in late morning as the sun warms aspects. Crowding remains minimal, averaging 2 on a 10-point scale, because approach length and avalanche exposure filter casual traffic.
Agassiz suits backcountry skiers, mountaineers, and high-altitude hikers comfortable with snow travel and terrain reading. Summer access via boot or scramble is possible after snowmelt, but the peak offers no established trails and no public facilities. Most visits occur as part of larger ridge or traverse objectives. Spring climbers must understand cornices, slab fracture, and aspect-driven warming. Experienced parties rope when snow is wet or unconsolidated. The 30-year maximum temperature of 41 degrees Fahrenheit and minimum of 16 degrees Fahrenheit show the full seasonal range; even summer carries cold nights and rapid evening cooling.
Nearby peaks like Pyramid and Ralston offer slightly more sheltered approaches and less avalanche terrain, making them better starting points for parties new to the area. The Tahoe Rim Trail passes within a few miles and offers lower-commitment ridge hiking. Highway 50 provides year-round access to the corridor, but winter chains or four-wheel drive are mandatory from mid-November through mid-April. Check the Sacramento Avalanche Center advisory before any snow-season approach; even experienced parties have been caught in slides in this zone during rapid warming events.