Ireland Lake
Lake · 10,734 ft · Yosemite corridor
Ireland Lake is a high-Sierra lake at 10,734 ft in the Yosemite corridor, fed by glacial melt and ringed by steep granite. Wind-exposed and snow-bound half the year, it's colder and windier than lower Yosemite Valley.
Afternoon wind is the dominant feature; the 30-day average wind of 13 mph typically peaks between mid-day and evening. Morning calm lasts until late morning. The lake sits in full sun exposure with no sheltering ridgeline. Winter snowpack persists into early summer, and avalanche terrain adjoins approach routes.
Over the last 30 days, Ireland Lake's average conditions have held steady around 35 on the NoGo Score, with an average wind of 13 mph and temperatures averaging 21 degrees Fahrenheit. The week ahead will likely track similar patterns; watch for afternoon wind gusts climbing toward 37 mph. Early morning and late evening windows are your best bet for calm water and softer light.
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About Ireland Lake
Ireland Lake sits in the high-Sierra Yosemite corridor east of the Sierra crest, accessed primarily via Highway 120 (Tioga Pass) and trailheads in the Mono Basin drainage. At 10,734 ft elevation, it occupies a glacially-carved basin surrounded by granite peaks and talus. The lake's base popularity is low (0.25), meaning it draws few crowds relative to Tenaya Lake or Ellery Lake to the south. Primary approach is via backpacking routes from the Tioga Pass or Mono Basin trailheads; day-trip access is limited and typically involves 6+ miles on foot. The water is snow-fed and remains cold year-round, even in mid-summer.
Ireland Lake's weather is driven by elevation and exposure. Over the rolling 365-day cycle, temperatures swing from a minimum of 8 degrees Fahrenheit in deep winter to a maximum of 34 degrees Fahrenheit in mid-summer. The 30-day average sits at 21 degrees, reflecting a shoulder-season or early-season window. Wind averages 13 mph over the last 30 days but has gusted to 37 mph. The most stable conditions occur between late morning and early afternoon; afternoon and evening wind ramps up reliably by 2 p.m. Crowding is minimal (6 on a rolling 30-day average), with visitor traffic concentrated around melt-out week in early summer and a brief spike in late September.
Ireland Lake suits backpackers and experienced mountaineers seeking isolation at high elevation. The lake's small size, cold temperature, and avalanche-adjacent terrain mean it is not ideal for casual swimmers or paddlers unfamiliar with winter mountaineering. Early-season visitors must assess snowpack conditions with the SAC Avalanche Center; winter and spring routes cross or adjoin avalanche paths. Summer access (late June onward) avoids most snow hazard, though residual cornices can persist into early July. Experienced visitors plan multi-day trips to justify the approach mileage and build in weather windows; a single calm morning is rare enough that flexibility in itinerary is essential.
Nearby alternatives include Ellery Lake (slightly lower, more accessible) and Tenaya Lake (broader, lower elevation, more tourist traffic). Ireland Lake's defining trait is remoteness and wind exposure. Visitors comparing this lake to Yosemite Valley's sheltered coves will find Ireland Lake 10+ degrees colder and substantially windier year-round. The SAC Avalanche Center monitors terrain near Mono Basin routes; check their forecast before winter and spring trips. Late September to early October offers the most stable conditions: snowpack is gone, afternoon winds are less severe than mid-summer, and crowds have departed.