Matthes Lake
Lake · 9,619 ft · Yosemite corridor
Matthes Lake sits at 9,619 feet in Yosemite's high Sierra, a glacially-fed alpine basin accessible via Highway 120. Spring and early summer bring snow melt and afternoon wind; exposure demands respect.
Wind accelerates off the lake by mid-afternoon, averaging 12 mph over 30 days but gusting to 33 mph. Morning calm extends until late morning; afternoon is reliably turbulent. Elevation keeps temperatures low; expect 24 degrees Fahrenheit on average. Snow lingers into late spring, making approach treacherous during unstable conditions.
The 30-day average wind of 12 mph masks gusts to 33 mph typical of high-elevation basins. Temperature hovers at 24 degrees Fahrenheit, well below Valley conditions. The forecast ahead shows the persistent afternoon wind pattern; plan around it. Crowding remains light at 6.0 average, typical for high-elevation alpine lakes off the main tourist corridor.
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About Matthes Lake
Matthes Lake drains into the Lyell Fork of the Merced River in the Cathedral Range of Yosemite's backcountry. The lake sits 2 miles north of the Lyell-Conness divide, accessed via the Lyell Canyon trail from the Tuolumne Meadows ranger station. Highway 120 (Tioga Pass Road) provides the only vehicle access to the trailhead; the route closes seasonally after early November and reopens in late spring. Gateway towns include Lee Vining to the east and Yosemite Valley to the west; drive time from Valley is approximately 2.5 hours via Highway 120.
Conditions at Matthes Lake reflect high-alpine exposure. The 30-day average temperature of 24 degrees Fahrenheit places this lake well below freezing for most of the year, with a year-round range from 12 to 38 degrees. Snow accumulates heavily and persists into early summer; unstable snowpack in spring demands avalanche awareness from parties traversing the approach. The 30-day average wind of 12 mph is deceptive; gusts to 33 mph occur regularly in afternoon hours as thermal-driven flow funnels through the basin. Crowding averages 6.0 on the 30-day rolling window, one of the lowest in the Yosemite corridor, reflecting both the high elevation and the technical nature of the approach.
Matthes Lake suits experienced backcountry travelers comfortable with snow travel, route-finding, and avalanche terrain. Fish are present; the lake holds brook trout. The site works as a backpack destination from Tuolumne Meadows or as a climbing-approach camp for Cathedral Range peaks. Parties should plan for morning ascents and descents; wind intensifies in afternoon and descends sharply at sunset. Water is fed by snow melt; treat or filter. Camping is permitted in designated sites away from sensitive meadow areas. Winter and spring access requires snow travel skills and real-time avalanche forecast consultation with the Sacramento Avalanche Center.
Nearby alternatives in the Yosemite corridor include Lyell Lake, closer and lower, with less snow persistence; Cathedral Lake, accessed via the Cathedral Lakes trail, offering slightly more traffic but faster approach; and the Tuolumne Meadows basin itself, warmer and more populated. Matthes Lake's isolation and alpine character suit solitude-seeking backpackers willing to navigate avalanche terrain and afternoon wind. Comparison to Mono Basin lakes east of the Sierra shows Matthes benefits from Tuolumne Meadows' developed infrastructure and ranger presence, though access remains weather-restricted and technical.