Bonnie Lake
Lake · Yosemite corridor
Bonnie Lake sits at 9,377 feet in the Yosemite corridor of the Sierra Nevada. This high-elevation alpine lake is colder and windier than valley alternatives, favoring calm-morning visits.
Wind accelerates through late morning and peaks in afternoon; mornings often glassy. The 30-day average wind of 13 mph masks gusts to 39 mph on exposed days. Expect sharply dropping temperatures after sunset. Early departure is mandatory for paddlers or anglers targeting stable conditions.
The past 30 days averaged 16 on the NoGo Score with temperatures around 25 degrees Fahrenheit and average wind of 13 mph. This stretch reflects typical spring volatility at elevation; calm mornings are followed by afternoon wind regimes. The week ahead will likely track similar patterns. Check the chart below for the specific day-by-day breakdown of wind, temperature, and crowding before committing.
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About Bonnie Lake
Bonnie Lake lies in the high Sierra backcountry of Yosemite's eastern corridor at 9,377 feet. Access is via the eastern approach from Lee Vining or Mono Basin; Highway 395 is the primary gateway. The lake drains into the Mono Basin watershed and sits among sparse alpine meadow and rock. Snowpack typically persists into late spring at this elevation. The basin is reached by day-hiking or overnight backpacking; no road access reaches the shore.
Conditions at Bonnie Lake are driven by elevation and exposure. The rolling 30-day average temperature of 25 degrees reflects the high-altitude regime where freezing nights occur even in late spring and early summer. Wind averages 13 mph over the past month but routinely gusts to 39 mph in afternoon hours when thermal currents accelerate through the Sierra passes. Morning conditions are distinctly calmer and warmer; afternoons are consistently windy and cold. Crowding remains light year-round due to the remote access and high-elevation commitment required.
Bonnie Lake suits anglers and backcountry paddlers willing to start early and depart by mid-afternoon. The lake's cold water and sparse shoreline development make it unappealing for day-trippers seeking comfort; serious wilderness visitors and photographers are the typical users. Plan for snow at the access trail through late spring. Bring layers for the sustained 25-degree average; wind chill will drive perceived temperature well below freezing on windy afternoons. Water temps remain near 40 degrees through summer. Cell service is absent; satellite communication or a PLB is wise for solo travel.
Nearby Tioga Pass and the Mono Basin lakes offer lower-elevation alternatives with easier access and milder spring conditions. Visitors considering Bonnie Lake should compare it against Gail Lake and other Mono Basin choices when assessing snowpack and crowd levels. The Yosemite corridor as a whole sees variable spring conditions; Bonnie Lake's high elevation means it opens later and closes earlier than Highway 120 destinations. Pair trips with reliable weather forecasts and traffic updates for the eastern Sierra approaches.