Lost Lakes Pass
Peak · 11,450 ft · Yosemite corridor
Lost Lakes Pass sits at 11450 feet in the Yosemite corridor's high Sierra, exposed to strong afternoon wind and avalanche terrain. A serious alpine crossing, not a casual ramble.
Wind averages 13 mph but regularly gusts to 40 mph, funneling up the drainage by mid-afternoon. The pass is typically colder than lower Yosemite elevations and holds snow well into spring. Morning calm windows are narrow; start before 10 am or expect sustained wind.
Over the last 30 days, Lost Lakes Pass averaged a NoGo Score of 34.0 with temperatures at 18 degrees and wind at 13 mph; gusts hit 40 mph. The week ahead will track seasonal patterns for late April: watch for rising afternoon instability and continued avalanche hazard as snowpack consolidates. Plan around early morning windows.
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About Lost Lakes Pass
Lost Lakes Pass is a 11450-foot alpine crossing in the Yosemite corridor of the central Sierra Nevada, straddling the High Sierra backcountry east of Yosemite National Park. Access via Highway 120 (Tioga Pass route) through the park, or via the eastern Sierra approaches from Mono County. The pass itself sits above the Lost Lakes drainage system, a snow-fed network that feeds into the broader Mono Basin. Primary gateways are Lee Vining to the east and Tuolumne Meadows to the west; both are 60 to 90 minutes of driving from the pass trailhead.
Lost Lakes Pass sits in genuine alpine terrain with avalanche exposure on multiple aspects. Over a rolling 30-day window, the 18-degree average temperature and 13 mph wind hide the reality: gusts spike to 40 mph regularly, and the pass remains snow-bound well into spring. Crowding is light (3.0 average) because the terrain is serious and the approach long. Late April sees transition conditions: snowpack is consolidating but stability remains a concern, and afternoon wind is relentless. Winter and early spring require avalanche assessment and winter travel skills; summer brings relief from snow but not from wind.
Lost Lakes Pass suits experienced winter mountaineers and backcountry ski traversers who understand avalanche terrain and can move early. The pass is not a good choice for casual day hikers or anyone uncomfortable in wind and exposure. Expect to start before dawn, summit before noon, and descend in deteriorating conditions if you delay. Parking at the trailhead fills on clear weekends in spring; vehicle access via Highway 120 can be limited or closed by snow and weather, especially before late May. Bring an avalanche beacon, probe, and shovel; check the Sierra Avalanche Center forecast before any winter or spring approach.
Nearby alternatives include Cathedral Lakes (lower elevation, less wind, shorter approach) and peaks along the Tioga Pass corridor like Mount Dana and Mount Gibbs (similar elevation, comparable wind exposure but more straightforward summit climbs). Lost Lakes Pass differs from these in that it is fundamentally a pass traverse rather than a peak summit, requiring route-finding and commitment to a longer day. The pass is best paired with multi-day Sierra traverses; a single-day out-and-back is exhausting and weather-dependent.