Mount LyellMount Lyell at a Glance
About Mount Lyell
Mount Lyell is the highest peak in Yosemite National Park, California, rising to about 13,114 feet (3,997 meters). It is located in the Sierra Nevada and is a primary high point within the park.
Hikers and mountaineers approach Mount Lyell from trailheads in the Tuolumne Meadows/Lyell Canyon area, often as part of routes on the John Muir Trail or alpine climbs. The mountain sits above the Lyell Glacier, which historically was the park’s largest glacier but has diminished significantly in recent decades.
The peak was named for the geologist Sir Charles Lyell. The area has been visited by mountaineers and surveyed by geological and glaciological researchers since the late 19th century.
Mount Lyell is located on the Sierra Nevada crest within Yosemite National Park in eastern California, accessible from the park’s Tioga Road and trails around Tuolumne Meadows.
- Highest point in Yosemite: Summit elevation about 13,114 feet (3,997 meters), the highest point within Yosemite National Park.
- Glacial significance: Site of Lyell Glacier, historically the largest glacier in Yosemite, which has shrunk substantially over the 20th and early 21st centuries.
Nearby Attractions to Mount Lyell
Best Time to Visit Mount Lyell
Summer months (June-September) provide the most reliable access and safer trail conditions.
Weather & Climate near Mount Lyell
Mount Lyell's climate is classified as Tundra - Tundra climate with cold summers (peaking in August) and freezing winters (coldest in March). Temperatures range from -15°C to 16°C. Moderate rainfall (970 mm/year).
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | - | -14° - -2° | -15° | 160 mm | - | - | 5.9 m/s | - | - |
| February | - | -14° - -2° | -16° | 129 mm | - | - | 5.4 m/s | - | - |
| March | - | -15° - -3° | -16° | 120 mm | - | - | 5.6 m/s | - | - |
| April | - | -13° - -2° | -14° | 71 mm | - | - | 5.6 m/s | - | - |
| May | - | -10° - 1° | -10° | 36 mm | - | - | 5.5 m/s | - | - |
| June | - | -5° - 6° | -5° | 25 mm | - | - | 5.2 m/s | - | - |
| July | - | -1° - 14° | 3° | 27 mm | - | - | 4.7 m/s | - | - |
| August | - | 1° - 16° | 6° | 32 mm | - | - | 4.8 m/s | - | - |
| September | - | -1° - 13° | 2° | 38 mm | - | - | 5.0 m/s | - | - |
| October | - | -5° - 8° | -4° | 53 mm | - | - | 5.5 m/s | - | - |
| November | - | -9° - 2° | -11° | 134 mm | - | - | 6.2 m/s | - | - |
| December | - | -13° - -1° | -14° | 145 mm | - | - | 6.1 m/s | - | - |
How to Get to Mount Lyell
Approaches to Mount Lyell start from trailheads in and around Yosemite National Park and the Sierra National Forest. Access depends on seasonal road openings and trail conditions; consult the National Park Service or Forest Service for the latest information.
Tips for Visiting Mount Lyell
- Use the historical mining trails for approach and context - many are now marked and give access to alpine meadows.
- Summer offers the most reliable conditions; thunderstorms form quickly in the Sierra afternoons.
- Check with local forest service offices for trail closures related to wildfire risk.