Fillmore Hill
Peak · 5,219 ft · North Sierra corridor
Fillmore Hill is a 5,219-foot peak in California's North Sierra corridor, sitting above the transition zone between lower foothills and alpine terrain. Wind and exposure define the summit experience.
The peak catches afternoon wind funneling off the ridgeline; mornings are typically calmer. Exposure is high on all aspects. Temperature swings 27 degrees from winter lows to spring highs. Avalanche terrain surrounds the approach; snowpack stability is the gating factor from winter into early spring.
Over the last 30 days, Fillmore Hill averaged a NoGo Score of 35.0 with temperatures holding near 40 degrees Fahrenheit and average wind at 7 mph. Wind gusts have peaked at 15 mph. The week ahead will show how spring conditions tighten or loosen; watch for afternoon windloads and lingering snow-coverage changes as temperatures fluctuate.
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About Fillmore Hill
Fillmore Hill sits in the North Sierra corridor near the crest of the range at 5,219 feet. Access is typically from Highway 50 or Highway 89 depending on the approach; local roads and forest service routes converge on the peak from multiple directions. The summit offers unobstructed views across the Sierra Nevada crest and down to the lower elevations of the western slope. Parking and trailhead facilities vary by route; scout access conditions before committing, as winter snowpack and spring runoff can close or degrade lower roads for weeks at a time.
Weather on Fillmore Hill is dominated by ridge-effect wind and rapid elevation-driven temperature swings. The 30-day average temperature is 40 degrees Fahrenheit; annual extremes range from 28 degrees in winter to 55 degrees in summer, a spread that mirrors the Sierra's continental climate. Wind averages 7 mph over the last month but has gusted to 15 mph, with afternoon acceleration typical as valley heating drives air up the slope. Crowding averages 5 on the 30-day window, indicating light to moderate foot traffic. Late September through early October offers the most stable conditions; winter and early spring require avalanche awareness and constant snowpack reassessment.
Fillmore Hill suits climbers, peak baggers, and backcountry skiers comfortable with exposure and wind. The summit is non-technical but demands respect for weather and avalanche terrain. Winter and spring ascents require beacon, probe, and shovel. Afternoon wind is predictable enough to plan around: start early, descend by early afternoon. Parking is limited and fills quickly on weekends in late spring and fall. The peak is best visited on weekday mornings when wind is lightest and crowds minimal. Avoid the first week after major highways open in spring; highway avalanche control work can close access abruptly.
Nearby alternatives in the North Sierra corridor include peaks and passes accessible from Highway 50 and Highway 89. Fillmore Hill's 5,219-foot elevation places it above most valley inversion layers but below the zone where summer thunderstorms dominate. Experienced Sierra visitors often pair it with lower-elevation traverses on the same trip, using Fillmore Hill as a scout summit for assessing snowpack and wind patterns before committing to longer alpine routes.