Rattlesnake Mountain
Peak · 6,948 ft · Lake Tahoe corridor
Rattlesnake Mountain is a 6948-foot peak in the Lake Tahoe corridor of California's Sierra Nevada. Typically calmer than exposed ridge lines above the lake, it draws winter ascents and spring snowshoers.
Wind averages 7 mph but funnels unpredictably off the lake below, especially mid-afternoon when thermal currents kick in. Temperatures hover around 38 degrees Fahrenheit over a rolling 30 days. Morning starts are noticeably calmer than afternoon; head up before 10 am if you're sensitive to wind.
Over the last 30 days, Rattlesnake Mountain has held a NoGo Score average of 42.0, with wind averaging 7 mph and temperatures near 38 degrees Fahrenheit. The week ahead will test whether stability holds or if afternoon wind and thermal effects push the peak into marginal territory. Watch the chart for score spikes tied to wind gusts; when they hit 17 mph (the local seasonal max), afternoon conditions deteriorate quickly.
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About Rattlesnake Mountain
Rattlesnake Mountain sits at 6948 feet in the high Sierra east of the Lake Tahoe basin, accessible from the Tahoe City gateway via Highway 89 north toward Truckee. The peak is a winter and spring objective for snowshoers and ski tourers working the avalanche terrain on its flanks. The standard approach climbs from a trailhead on the west side, gaining elevation through mixed forest and broken granite terrain. Snow typically lingers into late spring; before you leave, check the SAC (Sacramento Avalanche Center) forecast for slope stability, especially on north-facing gullies where slab conditions can develop rapidly.
Rattlesnake Mountain's character is defined by its midpoint elevation and proximity to the lake. The rolling 30-day average temperature of 38 degrees Fahrenheit reflects spring conditions; winter sees lows dip to 22 degrees Fahrenheit, while summer highs climb to 53 degrees Fahrenheit across the calendar year. Wind averages 7 mph but gusts to 17 mph are common on ridges and exposed traverses. Crowding remains low (average 2.0 over 30 days), which keeps parking stress minimal and visibility good even on busy weekends. The NoGo Score average of 42.0 indicates marginal-to-fair conditions; plan for days in the low range (scores near 5) rather than assuming consistent stability.
This peak suits climbers and ski tourers with avalanche awareness and route-finding skills. Snowshoers targeting lower slopes can avoid technical terrain entirely. Winter ascents demand awareness of cornicing on the ridge and wind-slab deposition on lee aspects. Spring conditions are most stable mid-week when thermal wind builds predictably; skip weekends if you want to avoid both crowds and afternoon thermals. Experienced parties often pair Rattlesnake Mountain with nearby peaks along the Tahoe Rim; the low base popularity (0.2) means you'll share the approach with far fewer people than on Sierra Buttes or Carson Peak.
Rattlesnake Mountain is a logical pairing with other high-Sierra objectives in the Tahoe corridor. Nearby peaks like Mount Tallac and Pyramid Peak offer slightly different exposure and elevation profiles; Tallac sits lower and catches more afternoon wind, while Pyramid Peak's north aspect holds snow longer. The Tahoe Rim Trail passes within several miles, offering a lower-elevation alternative when snow or avalanche risk spike the NoGo Score. Highway 89 is the primary access corridor; in spring, check road conditions before departing Tahoe City, as early season closures can delay approaches significantly.