Dorothy Lake Pass
Peak · 9,596 ft · Yosemite corridor
Dorothy Lake Pass is a 9596-foot peak in the Yosemite corridor's high Sierra, sitting above the glacial drainage between Highway 120 and the Tuolumne River headwaters. Wind exposure and avalanche terrain dominate the approach.
Wind funnels across the pass year-round, averaging 14 mph with gusts to 39 mph. Morning hours offer the calmest conditions; afternoon brings sustained ridge flow off the lake basin below. Snow persists into early summer, and cornices form on the east-facing slopes.
The 30-day average score of 33 reflects the pass's typical volatility: wind dominates most days, temperatures hover near 25 degrees Fahrenheit, and crowding stays minimal at 3 visitors on typical days. The week ahead will continue this pattern. Expect windows of calmer conditions between systems, but plan around afternoon wind strengthening by mid-day.
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About Dorothy Lake Pass
Dorothy Lake Pass sits at 9596 feet in the Yosemite high-country corridor, straddling the divide between the Lyell Fork drainage and the Tuolumne River basin. Access is via Highway 120 eastbound; the nearest gateway is Lee Vining, roughly 60 miles southeast. The pass can be approached from Tenaya Lake trailhead or via the Cathedral Lakes approach from Tuolumne Meadows, both gated in winter. Winter ascents require avalanche awareness and current SAC bulletins; the northeast-facing bowls above the pass hold unstable snow through spring.
Conditions here shift markedly by season. Winter and early spring bring consistent snow cover, temperatures averaging 25 degrees Fahrenheit with frequent episodes of wind to 39 mph. By late spring, daytime temperatures climb toward freezing levels and above, but wind remains the dominant factor. Summer (late June onward) sees clearer weather windows, though afternoon thunderstorms develop by mid-July. Fall offers stable conditions and lower crowds. The 30-day average wind of 14 mph masks the afternoon surge; morning ascents escape much of this funnelling effect.
Dorothy Lake Pass suits mountaineers and snow travelers with avalanche training. Day trips from Tuolumne Meadows or Lee Vining are common when Highway 120 opens. Experienced parties use the pass as a crossing point for high-Sierra ski traverses. Solo hikers and casual day-hikers should plan for steep terrain, route-finding above treeline, and rapid weather change. Parking at the trailhead fills early on clear weekends; arrive before dawn in summer. The pass has low base popularity (0.2) but sees sharp spikes after weather windows close snow below 9000 feet.
Nearby Cathedral Lakes and Mount Dana (11,965 feet) are logical pairings for a multi-day push. Mount Dana offers sustained wind exposure similar to Dorothy Lake Pass but higher elevation and more extreme cornicing. The Lyell Fork drainage below provides lower-elevation camping and water. In wet years, the creek runs aggressive through late summer, making the upper basin crossing unpredictable. Fall ascents, after Labor Day weekend, see the steadiest conditions and fewest crowds in the Yosemite high corridor.