Blue Lake
Lake · 10,528 ft · Yosemite corridor
Blue Lake sits at 10,528 feet in the Yosemite corridor's high Sierra, a glacially-carved alpine lake exposed to afternoon wind funnels off the ridge.
Wind dominates. Mornings are often calm; by early afternoon, gusts funnel down the drainage and can reach 40 mph. The lake's elevation and open aspect mean exposed swimmers and paddlers face rapid cooling and chop. Cold water persists year-round.
Over the last 30 days, Blue Lake averaged a NoGo Score of 34 with winds running 12 mph and temperatures hovering near 22 degrees. Expect the week ahead to track similar patterns: calm before 11 a.m., rising wind by noon, peak gusts in the afternoon. Crowding remains light, typical for a backcountry alpine lake.
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About Blue Lake
Blue Lake sits in the high Sierra just east of the Yosemite crest, accessed via Highway 120 (Tioga Road) and trailhead parking near Tenaya Lake or the Cathedral Lakes approach. The lake rests in a glacially-carved cirque at 10,528 feet, fully exposed to weather systems that sweep across the Sierra Nevada. Primary access is a backpacking approach; there is no vehicular access to the lake itself. Nearby gateway towns (Lee Vining, Mammoth Lakes, or Yosemite Village) sit 1 to 2 hours away by car. The lake's high-elevation position and open terrain mean weather and conditions can change rapidly.
Conditions here are driven by elevation and exposure. The 30-day average wind is 12 mph, but gusts routinely reach 40 mph in the afternoon as air funnels off the ridge. Temperatures average 22 degrees over the last month, with annual lows near 9 degrees and highs around 35 degrees. The lake freezes solid in winter; snowpack typically clears by late July, making the lake accessible for swimming and paddling from August through September. Crowding is light year-round (averaging 6 on a scale of 100), partly because the backcountry approach filters casual visitors. Spring and early summer bring higher avalanche risk in surrounding terrain; seek current conditions from the Sacramento Avalanche Center before approaching in winter or early spring.
Blue Lake suits experienced backcountry swimmers, cold-water paddlers, and mountaineers comfortable with exposed alpine conditions. Visitors planning to paddle should expect rapid chilling and wind-driven chop; morning calm windows close by late morning. Day-hikers and overnighters should carry layered insulation and be prepared to retreat if afternoon wind intensifies. Parking at trailheads fills quickly during peak summer weekends; arrive early or plan a weekday approach. The lake's position means afternoon thermal wind is nearly guaranteed; head out early or plan to shelter on the lee shore by noon.
Nearby alternatives include Cathedral Lakes (lower elevation, slightly less exposed) and Glen Aulin (lower-elevation meadow basin with different drainage patterns). For visitors planning a longer Sierra traverse, Blue Lake sits on or near routes linking Tenaya Lake, Tuolumne Meadows, and the Cathedral Range. The open exposure that makes Blue Lake windy also means clearer sightlines and less vegetation than lower alpine lakes; solitude is reliable, but weather exposure is the trade.