Rainbow Lakes
Lake · Eastern Sierra corridor
Rainbow Lakes sits at 10,696 feet in California's Eastern Sierra, a high-alpine basin fed by snowmelt. Wind-exposed and cold even in summer, it demands planning but rewards early visitors with calm water.
Afternoon wind is the ruling force here. Mornings offer flat water and visibility; by midday, gusts funnel down the basin and chop the surface. The 30-day average wind of 9 mph masks afternoon peaks of 24 mph. Temperature hovers around 27 degrees Fahrenheit on average, meaning ice and afternoon thermal winds shape every visit.
Over the past month, Rainbow Lakes averaged a NoGo Score of 12.0, with wind swinging between 9 and 24 mph and crowding staying light at 3.0 on average. The week ahead will test whether early-season stability holds. Watch for afternoon wind ramps and lingering snowpack at the shoreline; these patterns define the next 30 days.
30 days back / 7 days forward
Today's score by factor
About Rainbow Lakes
Rainbow Lakes lies in the high Sierra east of the Sierra crest, accessed via Highway 395 through the Eastern Sierra corridor. The lake sits in a glacially-carved cirque above 10,000 feet, making it one of the highest recreational alpine lakes in the region. Primary access routes funnel through Mammoth Lakes or Independence; drive times run 1 to 2 hours depending on trailhead. The basin is a destination for backpackers and day-hikers willing to climb for solitude. Parking fills first on weekends; arriving before dawn is not optional on busy periods.
Conditions at Rainbow Lakes are ruled by elevation and exposure. The 30-day average temperature of 27 degrees Fahrenheit is typical of high-alpine water in spring and early summer; expect ice at shoreline and water cold enough to require a wetsuit or drysuite for immersion. Wind averages 9 mph but gusts regularly to 24 mph by mid-afternoon, funneling down the drainage. Crowding remains sparse year-round (3.0 average), but the first warm weekend after snowmelt clears the access trail brings a visible jump. Late September through early October offers the warmest water and clearest skies, though weather can flip fast.
Rainbow Lakes suits backpackers, alpine photographers, and packrafters comfortable with exposed water and cold. Day-hikers targeting the lake should plan a pre-dawn start and exit by mid-afternoon, when wind peaks. The shoreline is rocky and talus-dominated; camps are few and weather-exposure is high. Snowpack blocks the trail well into summer in typical years; check conditions before driving. Those accustomed to lower Sierra lakes (Tenaya, Merced) will find Rainbow Lakes colder, windier, and less forgiving. A working knowledge of alpine weather and water safety is baseline.
Nearby alternatives include Kearsarge Lakes and Inyo Lakes to the south, both slightly lower and warmer but similarly exposed. The Eastern Sierra corridor offers a spectrum of elevations; descending to Mammoth Lakes basin trades wind-chop for crowds and more temperate water. Experienced visitors pair Rainbow Lakes with a clockwise loop through the Inyo drainage, timing the circuit to avoid the warmest afternoon hours at each lake. The trade-off is always the same: higher elevation means colder water, fewer people, and more wind; lower elevation flips each variable.