Grizzly Summit
Peak · 5,833 ft · North Sierra corridor
Grizzly Summit is a 5,833-foot peak in California's North Sierra corridor, sitting exposed to westerly winds and afternoon thermals. Higher and windier than lower valley approaches.
Wind builds steadily through morning and peaks mid-afternoon as thermals rise off lower elevations. Calm windows occur in early dawn before 9 a.m. Exposed ridgeline amplifies gusts; sheltered approach drainages run 3 to 5 mph calmer than the summit proper.
The 30-day average wind stands at 8 mph, with gusts to 15 mph; the 30-day average temperature is 42 degrees and the NoGo Score averages 35, indicating frequent marginal conditions. The coming week will likely hold similar patterns as spring weather settles into its rhythm of morning calm and afternoon wind.
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About Grizzly Summit
Grizzly Summit sits in the North Sierra corridor of the Sierra Nevada at 5,833 feet elevation, accessible primarily via Highway 89 north from Truckee or Highway 70 from the northeast. The peak crowns a ridge system draining west toward the Middle Fork Feather River; the approach from the south or southwest via Forest Service roads off Highway 89 is most direct. Gateway towns include Truckee to the south and Chester to the north. Winter and early spring approach requires vehicle capable of snow-packed forest roads; early summer typically opens direct foot access.
Grizzly Summit experiences marked seasonal wind swing tied to elevation and exposure. From late April through October, westerly and southwesterly flow dominates, building pressure and velocity between 10 a.m. and 4 p.m. The 30-day average wind of 8 mph masks afternoon extremes that reach the 30-day maximum of 15 mph. Winter sees the same corridors but at lower temperatures; the 365-day minimum stands at 28 degrees. The rolling 30-day average temperature of 42 degrees reflects late spring transition: early mornings still below freezing, afternoons climbing into the upper 40s. Crowding stays light year-round; the 30-day average crowding is 5, reflecting the location's remoteness and technical approach.
Grizzly Summit suits experienced backcountry travelers and peak baggers comfortable with sustained wind and avalanche terrain. Winter ascents demand competent snow travel; the North Sierra corridor is within SAC avalanche center coverage and the peak retains avalanche slopes through May in heavy snow years. Spring and early summer reward early starts: leave at first light, expect to summit and descend before 2 p.m. wind build. Summer and early fall offer the longest daylight windows but afternoon thermals can drive sustained wind. Pack for rapid condition change; exposed ridgeline offers zero shelter once you clear tree line.
Nearby peaks in the corridor include Warren Peak and several unnamed summits visible from the summit ridge. Lower-elevation approaches via Forest Service roads to nearby lakes offer calmer conditions for those avoiding sustained ridge exposure. The North Sierra corridor as a whole trades direct access for fewer crowds compared to the high Tahoe basin or Highway 395 corridor just east.