Lyell Glacier is a glacier in Tuolumne County, California at about 3,787 m (12,425 ft) above sea level. It lies in or next to Yosemite National Park, so park hours, fees and rules apply. It sits roughly 27 km (17 mi) E of Yosemite Valley.
Lyell Glacier is in the Sierra Nevada of California. The glacier was discovered by John Muir in 1871, and was the largest glacier in Yosemite National Park. It lies on the northern slopes of Mount Lyell. The glacier has retreated since the end of the Little Ice Age in the mid-19th century. During the mid-20th Century, the glacier split into two smaller glaciers occupying the high cirques of Mount Lyell. Since 1883, the glacier area has retreated up to 70 percent. Another glacier, the Maclure Glacier on nearby Mount Maclure, has also retreated significantly. According to a study in 2013, today the Lyell is no longer a glacier, having lost any movement and thus it should be considered an ice field.From the Wikipedia article “Lyell Glacier”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Lyell Glacier the sunrise point swings a long way through the year: about 59° (ENE) at the June solstice and 120° (ESE) in late December. Sunset moves from 301° (WNW) in June to 241° (WSW) in December, and the midday sun climbs to 76° in summer but only 29° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:01 AM | 90° E | 7:09 PM | 271° W | 52° | 12h 08m |
| June solstice (Jun 21) | 5:36 AM | 59° ENE | 8:23 PM | 301° WNW | 76° | 14h 47m |
| September equinox (Sep 22) | 6:46 AM | 89° E | 6:56 PM | 271° W | 53° | 12h 10m |
| December solstice (Dec 21) | 7:10 AM | 120° ESE | 4:42 PM | 241° WSW | 29° | 9h 33m |
Azimuth is measured clockwise from true north (90° = east, 270° = west). Computed for 2026; values change by less than a degree from year to year.
Golden hour & blue hour by month
Ice shows its blue best under overcast skies or in shade; bright sun turns glaciers white and flat.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:43 AM | 7:12 AM | 7:52 AM | 4:23 PM | 5:02 PM | 5:31 PM | 9h 51m |
| February | 6:21 AM | 6:48 AM | 7:24 AM | 5:00 PM | 5:37 PM | 6:03 PM | 10h 49m |
| March | 6:43 AM | 7:09 AM | 7:44 AM | 6:30 PM | 7:05 PM | 7:31 PM | 11h 56m |
| April | 5:55 AM | 6:23 AM | 6:58 AM | 6:58 PM | 7:33 PM | 8:00 PM | 13h 10m |
| May | 5:19 AM | 5:48 AM | 6:26 AM | 7:23 PM | 8:00 PM | 8:30 PM | 14h 12m |
| June | 5:04 AM | 5:36 AM | 6:15 AM | 7:42 PM | 8:21 PM | 8:53 PM | 14h 46m |
| July | 5:17 AM | 5:48 AM | 6:26 AM | 7:41 PM | 8:19 PM | 8:50 PM | 14h 32m |
| August | 5:46 AM | 6:14 AM | 6:49 AM | 7:15 PM | 7:51 PM | 8:19 PM | 13h 38m |
| September | 6:13 AM | 6:40 AM | 7:14 AM | 6:32 PM | 7:07 PM | 7:33 PM | 12h 27m |
| October | 6:40 AM | 7:06 AM | 7:41 AM | 5:45 PM | 6:21 PM | 6:47 PM | 11h 15m |
| November | 6:10 AM | 6:38 AM | 7:17 AM | 4:09 PM | 4:47 PM | 5:15 PM | 10h 09m |
| December | 6:37 AM | 7:06 AM | 7:47 AM | 3:59 PM | 4:40 PM | 5:10 PM | 9h 34m |
Local time (America/Los Angeles), including daylight saving time. Golden hour runs from about −4° to +6° solar altitude, so the morning golden hour begins during blue hour, before sunrise.
Milky Way & night sky
From Lyell Glacier, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 5.3 hours on a moonless night), and the core peaks around 23° above the southern horizon. Our light-pollution model puts the sky at about Bortle 2 (typical truly dark site), which is excellent for astrophotography.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -1° | — |
| February | 4:55 AM – 5:15 AM | 0.3 | 13° | SE → SE |
| March | 4:02 AM – 5:32 AM | 1.5 | 20° | SE → SSE |
| April | 2:06 AM – 4:46 AM | 2.7 | 23° | SE → S |
| May | 12:05 AM – 3:55 AM | 3.8 | 23° | SE → S |
| June | 10:16 PM – 3:36 AM | 5.3 | 23° | SE → SW |
| July | 10:09 PM – 2:09 AM | 4.0 | 23° | SSE → SW |
| August | 9:29 PM – 12:09 AM | 2.7 | 23° | S → SW |
| September | 8:35 PM – 10:05 PM | 1.5 | 20° | SSW → SW |
| October | 7:48 PM – 8:08 PM | 0.3 | 13° | SW → SW |
| November | Below 10° in darkness | — | 1° | — |
| December | Below 10° in darkness | — | -19° | — |
Window when the galactic core is at least 10° high during astronomical darkness on the 15th of each month. Pick nights within a few days of the new moon. Plan exact nights with the Milky Way planner.
Estimated sky darkness: 2 Bortle 2 — Typical truly dark site. The summer Milky Way shows rich structure; clouds look like black holes in the stars. Modeled zenith brightness ≈ 21.72 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show August as the clearest month (about 15% average cloud cover) and December as the cloudiest (54%). July is the warmest month and December the coldest, which matters for gear, snow access and how long batteries last at night.
Average cloud cover (%)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 60 | 64 | 67 | 72 | 86 | 91 | 96 | 91 | 90 | 82 | 74 | 62 |
| Low °F | -9 | -7 | -4 | -3 | 15 | 24 | 39 | 34 | 23 | 14 | -9 | -12 |
| Precip. (in) | 4.4 | 4.7 | 3.7 | 2.4 | 1.3 | 0.4 | 0.4 | 0.2 | 0.2 | 1.4 | 2.4 | 4.8 |
Monthly climatology for the surrounding 1° grid cell from NASA POWER (MERRA-2). Mountain sites can be colder and cloudier than the cell average.
Photography tips for this glacier
- Boat tours to tidewater glaciers offer calving shots; use fast shutter speeds and a telephoto.
- Never walk on a glacier without training and gear; crevasses hide under snow bridges.
- Expose carefully: ice and snow fool meters into underexposure, so add +1 to +2 stops.
- A polarizer deepens the blue of glacial ice and the turquoise of meltwater lakes.
- Include a person or boat for scale — glaciers are much larger than they look.
- Shoot RAW to keep the most latitude for high-contrast sunrise and sunset scenes.
Season: Summer offers access; late summer exposes the most bare ice before new snow.
Suggested gear: Telephoto lens, Polarizer, Waterproof shell, Spare batteries (cold drains them). Work out exposures with the depth of field, ND filter and NPF rule calculators.
Permits, drones & access
National Park Service rules. Under federal law (54 U.S.C. 100905), still photography in National Park Service areas needs a permit only when it (1) takes place where members of the public are not allowed, (2) uses models, sets or props that are not part of the location's natural or cultural resources or administrative facilities, or (3) would cause the park to incur additional administrative costs to monitor the activity. Ordinary visitor and most landscape photography needs no permit. Commercial filming rules are separate and have changed in recent years — confirm current requirements with the park before a paid shoot.
Drones: Launching, landing or operating unmanned aircraft (drones) is prohibited in National Park Service units under a 2014 Superintendent's closure (36 CFR 1.5), except where a park has issued specific written approval. Flying from outside the boundary over park land can also violate park rules and disturb wildlife.
Nearby photo spots
Other locations within 25 km of Lyell Glacier, closest first.
Mountain Peak
Mountain PeakGlacier
Mountain Pass
Mountain Peak
Lake
Mountain Pass
LakeMountain PeakCampgrounds nearby (Recreation.gov)
- Silver Lake Campground June Lake (Ca)13.3 km (8.3 mi) · reservable
- Tuolumne Meadows Campground16.3 km (10.1 mi) · reservable
- Reversed Creek Campground16.6 km (10.3 mi) · reservable
- Gull Lake Campground16.6 km (10.3 mi) · reservable
- Agnew Meadows Group Camp17.1 km (10.6 mi) · reservable
FAQ
When is the best time to photograph Lyell Glacier?
What time is golden hour at Lyell Glacier?
Where does the sun rise and set at Lyell Glacier?
Can you see the Milky Way from Lyell Glacier?
Do you need a permit to photograph at Lyell Glacier?
How far is Lyell Glacier from Yosemite Valley?
Sources
Location data: Wikidata, USGS GNIS / GeoNames, Wikipedia. Sun, moon and Milky Way times are computed by LWPhoto Atlas for 2026. Climate: NASA POWER. Sky darkness is a population-based estimate (Walker's law), not a measurement. See data sources & licenses.