Sister Lake
Lake · Yosemite corridor
Sister Lake sits at 9,557 feet in the Yosemite corridor's high Sierra. This small alpine lake offers calm morning conditions and moderate exposure to afternoon wind.
Sister Lake transitions from sheltered early morning to increasingly exposed conditions by mid-afternoon. Wind funnels across open water in the afternoon, raising the 30-day average wind to 11 mph. Morning paddlers and anglers find the flattest conditions; afternoon visitors should expect sustained gusts.
Over the last 30 days, Sister Lake averaged a NoGo Score of 16.0 with temperatures around 25 degrees Fahrenheit and average wind of 11 mph, typical for high-Sierra spring conditions. The 7-day forecast ahead tracks shifts in afternoon wind intensity and crowding as weather systems move through; use the chart to spot calm windows and avoid peak afternoon exposure.
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About Sister Lake
Sister Lake lies at 9,557 feet in the high Sierra within the Yosemite corridor, accessed via Highway 120 east from Yosemite Valley. The lake sits in the shadow of the Cathedral Range and drains into the Tuolumne River system. From the main Highway 120 corridor, Sister Lake is a secondary destination requiring a short off-road approach. Gateway towns are Lee Vining to the east and Yosemite Village to the west. Spring and early summer snowmelt drives water level and access timing. The lake is smallest of the nearby chain lakes but sits in a more protected cove than the open water just east.
Sister Lake experiences classic high-Sierra spring and early-summer conditions. At nearly 10,000 feet, the lake remains ice-locked into May some years, with water temperature staying near 40 degrees Fahrenheit even after melt. The 30-day average temperature of 25 degrees reflects late winter and early spring data; by late spring, midday highs climb to the mid-50s while mornings stay below freezing. Average wind of 11 mph is moderate for the elevation, but the lake's orientation funnels afternoon gusts to 30 mph on exposed days. Crowding (30-day average of 6.0) remains light outside the first weekends after Highway 120 fully reopens, typically in mid-May. Morning conditions are calmer than afternoon.
Sister Lake suits anglers, kayakers, and photographers willing to start early and depart by mid-afternoon. The shallow, cold water supports native cutthroat; fishing is best in early morning and late evening before wind peaks. Paddlers should carry a spray skirt and practice cold-water re-entry; the lake is too small and cold to recover from a capsize without rescue. Visitors planning a full day should camp nearby or break the visit into two short sessions. Parking is limited and fills on weekends after snow clears. Snow-slab and snow-bridge hazards linger into June on slopes above the lake; stay on marked trails and avoid lingering under corniced ridges.
Cathedral Lake lies due north and is slightly larger but more exposed to afternoon wind. Tenaya Lake, 8 miles west on Highway 120, receives far more traffic but offers better facilities and more reliable access. Visitors comfortable with high-elevation conditions and cold-water preparation find Sister Lake rewarding for solitude. The shorter season (typically June through September) and limited access roads mean early-summer planning is essential. Spring and early-autumn conditions shift rapidly; monitor current snowpack and road-closure reports before committing to a trip.