Upper Long Lake
Lake · Yosemite corridor
Upper Long Lake sits at 8629 feet in the Yosemite corridor of California's Sierra Nevada. A high-elevation alpine lake sheltered from direct western exposure, it runs calmer than the open water immediately downstream.
Wind funnels off the lake by mid-afternoon as thermals build; mornings are consistently gentler. Surface conditions swing from glassy at dawn to choppy and unreliable by 2 PM. Cold water and thin air demand respect; the 30-day average wind is 13 mph, but gusts reach 39 mph.
The last 30 days averaged a NoGo Score of 16.0 with temperatures around 25 degrees Fahrenheit and wind at 13 mph on average. The week ahead will track similar patterns as spring transitions into early summer; expect scattered windows of calm early morning, then building afternoon wind. Crowding remains light at this elevation and distance from Highway 120.
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About Upper Long Lake
Upper Long Lake lies in the high Sierra drainage system east of Yosemite Valley, accessed via the Yosemite corridor. The lake sits at 8629 feet elevation, making it a true alpine destination with snow-fed clarity and cold water year-round. Primary access is via Highway 120 from the west or Highway 395 from the east, with the lake sitting inland from the main highway corridors. The approach involves a mix of established routes and backcountry travel; check current conditions with the Yosemite National Park backcountry office before committing. The remote location and elevation keep crowds sparse compared to valley lakes.
Conditions at Upper Long Lake are driven by elevation and exposure. The 30-day average wind of 13 mph masks strong diurnal patterns: morning calms give way to afternoon thermals that routinely push gusts toward 39 mph. Temperature hovers around 25 degrees Fahrenheit over the rolling 30-day window, with the annual range spanning 9 to 37 degrees. Snow persists into late spring, and water temperature remains near freezing through early summer. Early morning paddling or fishing yields the calmest windows; skip the lake after 1 PM if you require glassy conditions. Crowding averages 6 out of 10 over the month, but this reflects occasional weekends; mid-week visits are substantially quieter.
Upper Long Lake suits experienced paddlers, anglers, and backcountry hikers accustomed to high-elevation weather swings and cold water immersion. Day visitors should plan a dawn start and expect to be off the water by early afternoon. Kayakers and canoeists must carry cold-water gear and understand that wind gusts can build rapidly after 10 AM. The remote setting and minimal infrastructure mean self-sufficiency is non-negotiable; no services, rentals, or shelters exist on-site. Winter and early spring access is limited by snow; the reliable season runs from late spring into early fall. Spring water crossings and lingering snow patches require current route intelligence.
Nearby Mono Basin lakes and eastern Sierra water offer similar alpine conditions with slightly different access; Upper Long Lake's inland position gives it a reputation for slightly more protection from the strongest western winds than exposed reservoirs along Highway 395. Lower Long Lake, immediately downstream, captures overflow and provides an alternative if Upper Long Lake is too exposed. The Yosemite corridor as a whole swings between high-altitude calm and sudden afternoon blow-ups; no single location guarantees all-day wind reliability at this elevation.