Dorothy Lake
Lake · Yosemite corridor
Dorothy Lake sits at 9,409 feet in the Yosemite corridor of California's Sierra Nevada, a glacially-fed alpine basin exposed to afternoon wind funneling off the eastern slope.
Wind dominates the afternoon; mornings are calm and cold. The 30-day average wind of 13 mph masks afternoon gusts reaching 39 mph by mid-afternoon. Water temperature stays below freezing most of the year. Visit early in the day for stability.
Dorothy Lake's 30-day average score of 16.0 reflects consistent afternoon wind and cold water typical of high-Sierra alpine lakes. The last month showed a low of 6.0 and a high of 34.0, indicating wide day-to-day swings. Watch the 7-day forecast for morning stillness windows; afternoon deterioration is nearly certain.
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About Dorothy Lake
Dorothy Lake lies in the high country between Yosemite's Tioga Road (Highway 120) and the Mono Basin. Access via Highway 120 east of Tenaya Lake; the trailhead sits roughly 8 miles beyond Tenaya Lake near Cathedral Lakes. The lake drains north into the Lyell Fork of the Tuolumne River. Elevation gain from the trailhead is substantial on a steep approach. Highway 120 opens late spring and closes by early fall, making the season window narrow. The nearest gateway is Lee Vining to the east or Yosemite Village to the west.
The lake experiences extreme seasonal swings. Winter and early spring bring deep snow and subfreezing conditions; the 365-day minimum temperature is 9 degrees Fahrenheit. Summer sees brief warm spells, but the 365-day maximum is only 37 degrees. The 30-day average temperature of 25 degrees reflects late-April conditions on this survey. Wind averages 13 mph over the past month but peaks at 39 mph in afternoon cells driven by pressure gradients off the Sierra crest. Crowding averages just 6 out of 100, indicating sparse visitation; the location's base popularity is low and remains so except during short windows after Highway 120 opens.
Dorothy Lake suits experienced hikers and climbers seeking isolation and technical challenges. The approach is steep and exposed; snow lingers into early summer, and afternoon thunderstorms are common in midsummer. Paddlers and swimmers face water temperatures that remain lethally cold year-round. Plan for pre-dawn starts and descent by noon to avoid afternoon wind and electrical risk. Parking at the trailhead fills rarely, but the narrow Highway 120 corridor can experience delays during holiday periods. Bring layers and expect variable visibility; the lake sits on the ridge between maritime and continental air masses.
Nearby alternatives include Cathedral Lakes and Tenaya Lake, both on Highway 120 but at lower elevations and more accessible. Cathedral Lakes offer similar alpine character with slightly warmer conditions. Tenaya Lake, only 8 miles west, is calmer in afternoon wind and sees more reliable road access. Visitors often combine Dorothy Lake with a Lyell Fork creek crossing for a high-country traverse. The Yosemite corridor as a whole experiences afternoon wind as a defining trait; Dorothy Lake is among the more exposed venues.