Anne Lake
Lake · 10,219 ft · Mammoth Lakes corridor
Anne Lake sits at 10,219 feet in the Mammoth Lakes corridor of California's Sierra Nevada, a high-alpine lake flanked by avalanche terrain and wind-exposed granite. Calmer in early morning, it draws backcountry skiers and mountaineers in spring.
Wind averages 12 mph and funnels off the lake by mid-afternoon; expect gusts to 36 mph in the rolling 30-day window. Temperature hovers near 25 degrees Fahrenheit on average. Morning calm breaks by late morning. Afternoon is consistently windier and colder. Avalanche terrain surrounds the approach.
Over the last 30 days, Anne Lake has averaged a NoGo Score of 37, with wind holding at 12 mph and temperature at 25 degrees Fahrenheit. Conditions have ranged from favorable (score 6) to marginal (score 65). The week ahead will follow seasonal patterns: expect mornings calmer than afternoons, with crowding remaining light at 4 on average. Watch the temperature trend; above 41 degrees triggers faster snowpack destabilization in this avalanche-prone terrain.
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About Anne Lake
Anne Lake occupies a glacial basin high in the Mammoth Lakes corridor, accessed primarily from the Mammoth area via Highway 395 and then high-country routes into the Sierra crest zone. The lake sits at 10,219 feet, well above tree line, surrounded by exposed alpine meadow and talus. Primary approach is winter backcountry travel from the Mammoth basin or the eastern Sierra trailheads. Parties typically route via high passes and snow travel; summer access is limited to late July through early September. This is not a roadside destination. Backcountry skiers and mountaineers familiar with avalanche terrain and route-finding in alpine zones are the core user base.
Anne Lake's weather is dominated by its elevation and exposure. The 30-day rolling average shows 12 mph wind and 25 degrees Fahrenheit temperature; the annual range spans 12 to 41 degrees Fahrenheit. Wind is consistently stronger in afternoon hours and funnels down the lake basin from the north and west. Spring (March through May) brings the heaviest snowpack and highest avalanche hazard; choose calm mornings and descend by early afternoon to avoid wind-loaded slopes and rapid warming. Summer is passable but brief. Fall snow arrives by late September. Winter is the domain of experienced backcountry travelers only. Crowding averages 4 out of 10, reflecting the location's remote access and technical barrier to entry.
Anne Lake suits experienced backcountry skiers, mountaineers, and high-alpine hikers willing to navigate avalanche terrain and untracked snow. The typical visitor spends a full day in the basin and plans around wind and temperature. Skip afternoon travel; head here on calm mornings and plan descent before wind picks up. Bring avalanche safety kit and beacon. High-altitude acclimatization matters; the 10,219-foot elevation is unforgiving for flatlanders. Parking is backcountry car camping or established trailheads in the Mammoth corridor; no on-site facilities exist. Snow conditions dictate access; early summer melt can create impassable creek fords.
Nearby Mammoth Lakes basin offers easier-access alpine lakes (Duck Lake, Arrowhead Lake) and shuttle-served backcountry zones. The Eastern Sierra High Route passes through this zone. Comparison: Anne Lake is higher, more exposed, and less crowded than popular roadside lakes like Mammoth Lake itself, but demands serious mountaineering skill. Winter conditions here rival Yosemite's high passes; avalanche risk and weather isolation are non-negotiable. Spring conditions can be excellent for ski touring if you read the snowpack and respect the terrain.