Lyell Col
Peak · 12,468 ft · Yosemite corridor
Lyell Col is a 12,468-foot Sierra Nevada pass in Yosemite's high country, sitting between Mount Lyell and Mount Maclure. A high-altitude crossing point favored by mountaineers and backcountry skiers, it experiences sustained wind and avalanche-terrain exposure.
Wind averages 12 mph over the last month but regularly gusts to 40 mph, intensifying in early afternoon as thermal circulation builds. Temperatures sit near 22 degrees Fahrenheit across the rolling 30-day window. Afternoon conditions deteriorate sharply; morning ascents and descents yield the steadiest weather.
Over the past 30 days, Lyell Col averaged a NoGo Score of 33 with wind holding at 12 mph and temperatures near 22 degrees Fahrenheit. The week ahead will track seasonal patterns typical for high-Sierra passes in late spring. Watch for wind spikes in the afternoon window and lingering snowpack on north-facing terrain.
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About Lyell Col
Lyell Col lies on the high crest of the Sierra Nevada at 12,468 feet, straddling the boundary between Mount Lyell and Mount Maclure in the Yosemite corridor. The col is accessed primarily via the High Sierra Camps loop or direct ascent from Lyell Canyon to the north. Highway 120 (Tioga Road) provides the nearest trailhead access; the drive from Yosemite Valley or Lee Vining takes 1.5 to 2 hours depending on road conditions. The col sits in avalanche terrain managed by the SAC (Sierra Avalanche Center); winter and early-spring ascents require solid snowpack assessment and route-finding skill.
Conditions at Lyell Col are dominated by high-altitude exposure and thermal wind patterns. The 30-day average wind of 12 mph masks afternoon gusts that regularly reach 40 mph. Temperatures average 22 degrees Fahrenheit and range between a low of 9 and high of 35 degrees Fahrenheit across the full year. Crowding remains light to moderate (average 3 on the NoGo scale), reflecting the technical nature of the approach and high-elevation commitment. Spring and early summer bring lingering snowpack and wet-slab avalanche hazard; late summer offers snow-free travel but increased afternoon wind. Autumn brings the most stable conditions and clearest views, though high-altitude storms can arrive with little warning.
Lyell Col suits mountaineers and backcountry skiers with solid winter travel skills and avalanche awareness. Day trips are rare due to elevation and route complexity; most visitors plan overnight or multi-day missions via the High Sierra Camps or wilderness camping. Early-morning starts are non-negotiable. Wind and temperature swings demand layered systems and wind-resistant shell clothing even in summer. Avalanche terrain on the approach requires beacon, probe, and shovel in winter and spring. Parking at the Tioga Road trailheads fills quickly on weekends in late summer and early autumn; weekday visits significantly improve solitude and road-access reliability.
Nearby alternatives include Mount Dana (13,053 feet) to the northeast, which offers a shorter and less-technical high-country crossing with comparable wind exposure. The High Sierra Camps loop provides lower-elevation overnight options with maintained structure and water caches. Mount Conness and the Cathedral Range to the north offer similar alpine terrain with variable access depending on snow depth. Visitors chasing stable weather and lower wind should consider mid-to-late September, when thermal patterns ease and most winter snowpack has melted.