Margaret Lake
Lake · 10,951 ft · Eastern Sierra corridor
Margaret Lake sits at 10,951 feet in the Eastern Sierra, a high-elevation alpine basin surrounded by granite walls. Snow-fed and typically calmer than lower Inyo County lakes, it rewards early visits.
Wind arrives reliably by afternoon, funneling down the drainage as sun warms the surrounding peaks. Morning hours are substantially calmer. Temperature swings are sharp; expect single digits at dawn even in late spring. Snowpack lingers into early summer on approach and surrounding terrain.
Over the past 30 days, Margaret Lake has averaged a 36 NoGo Score with wind typically at 9 mph but spiking to 24 mph on bad afternoons. Temperatures averaged 27 degrees Fahrenheit. The week ahead follows the same pattern: early calm, afternoon wind, and lingering snow. Plan for first-light access and watch for rapid afternoon deterioration.
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About Margaret Lake
Margaret Lake lies in the Eastern Sierra's high backcountry, northeast of Bishop and southeast of Mammoth Lakes. Access is via Highway 395 to the June Lake Loop (Highway 158) or direct approach via dirt roads from the Inyo National Forest. The lake sits in a glacially-carved basin at nearly 11,000 feet, accessible primarily by foot or horseback once snow clears the approach trail. Winter and early spring require avalanche awareness on approach slopes; the surrounding terrain holds substantial snow-loaded aspects.
Conditions at Margaret Lake are dominated by elevation and exposure to afternoon wind channeling down the valley. The 30-day average wind of 9 mph masks significant daily variability; calm mornings typically give way to 15 to 24 mph gusts by mid-afternoon. Temperature averages 27 degrees Fahrenheit across the rolling month, with the annual range spanning 11 to 44 degrees. Crowding remains minimal year-round (3.0 average), reflecting the lake's remote setting and seasonal access limitations. Summer offers the most stable weather and clearest approach; autumn and spring are unpredictable.
Margaret Lake suits backpackers, mountaineers, and alpine fisheries researchers comfortable with high elevation and early-season snow. Paddlers and swimmers are rare at this elevation and latitude. Experienced visitors plan visits for June through September, arrive before dawn, and depart by early afternoon to avoid wind. The approach demands proper navigation and avalanche awareness; late-winter and spring trips require current snowpack assessment from the Eastern Sierra Avalanche Center. Parking is limited and informal near the trailhead.
Nearby Gem Lake and Waugh Lake offer similar alpine character at only marginally lower elevations; both experience comparable afternoon wind and seasonal access constraints. The Mammoth Lakes Basin to the west sits lower and warms earlier but sees substantially heavier foot traffic. June Lake Loop provides a slower scenic alternative to Highway 395 when conditions permit. All three access corridors should be planned around afternoon wind and early-season snowpack.