Bernice Lake
Lake · 10,219 ft · Yosemite corridor
Bernice Lake sits at 10,219 feet in the Yosemite corridor's high Sierra, a glacially-carved alpine basin exposed to afternoon wind funneling off the eastern slope.
Wind dominates the afternoon; mornings are typically calmer. The 30-day average wind of 13 mph accelerates to 37 mph gusts by mid-day. At this elevation, temperature swings are sharp. Expect afternoon instability even on mild days.
Over the past 30 days, Bernice Lake has averaged a NoGo Score of 35, with temperatures hovering around 21 degrees Fahrenheit and average wind at 13 mph. The week ahead continues this pattern of morning stability and afternoon deterioration. Winter snowpack and avalanche terrain remain relevant through spring; assess approach and slope stability before travel.
30 days back / 7 days forward
Today's score by factor
About Bernice Lake
Bernice Lake is a small alpine lake in the high Sierra east of Yosemite Valley, accessed via the Tioga Pass corridor (Highway 120). The lake sits in open, glacially-carved terrain with minimal tree shelter. Primary approach is from the Lee Vining side via Inyo National Forest trails; the standard route takes 6 to 8 hours. Nearest towns are Lee Vining (east, 90 minutes by car) and Mammoth Lakes (south). The lake is best reached mid-July through September when snow clears the approach; winter access requires mountaineering gear and avalanche assessment.
At 10,219 feet, Bernice Lake experiences cold, thin-air conditions typical of the high Sierra. The 30-day average temperature of 21 degrees Fahrenheit reflects late spring or early autumn conditions; summer highs reach into the 30s Fahrenheit, while winter minima drop to 8 degrees or lower. Wind is the dominant feature. The average wind speed of 13 mph obscures the true pattern: mornings are often glassy, but afternoon wind regularly hits 37 mph, funneling down the east face and making water conditions chaotic by 2 pm. Crowding remains low year-round (average 6 out of 100), a function of remote access and the lake's small size. Late September offers the best combination of stable weather and minimal snow.
Bernice Lake suits experienced alpinists, mountaineers, and high-altitude backpackers comfortable with exposure and wind. It is not a casual destination. The open terrain means no wind shelter; paddlers and anglers must plan around the afternoon gale. Parking at trailheads fills quickly on weekends during the accessible window (mid-July to early September). Bring heavy-duty wind protection and accept that you will likely see conditions worsen after midday. Avalanche terrain surrounds the lake; spring and early summer require slope assessment and familiarity with snowpack instability. Solo travel and off-trail navigation carry high risk at this elevation.
Nearby alternatives include Mono Lake (lower, more accessible, less avalanche terrain) and the Mono Basin lakes accessed from US 395. Bernice Lake differs from Yosemite Valley lakes in that it sits in raw, above-treeline terrain with minimal infrastructure and no ranger presence. The trade-off is solitude and raw Sierra character. Climbers heading to nearby peaks often use Bernice Lake as a camp or water source rather than a destination in itself.