Maclure Glacier is a glacier in Tuolumne County, California at about 3,676 m (12,060 ft) above sea level. It is part of Yosemite Wilderness. It sits roughly 26 km (16 mi) E of Yosemite Valley.
Maclure Glacier (also McClure Glacier) is on Mount Maclure in the Sierra Nevada crest of Yosemite National Park in Tuolumne County, California, United States. The glacier is named after William Maclure. Like most glaciers in the Sierra Nevada, Maclure Glacier is a small cirque glacier that is .20 mi (0.32 km) long and covers an area of only .08 sq mi (0.21 km2). The mean elevation of the glacier is around 11,400 ft (3,500 m). Both the Maclure Glacier and the Lyell Glacier, located nearby on Mount Lyell, have retreated since their first discovery.From the Wikipedia article “Maclure Glacier”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Maclure 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 50m |
| February | 6:21 AM | 6:48 AM | 7:24 AM | 5:00 PM | 5:37 PM | 6:04 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 | 8:01 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 | 6:50 AM | 7:16 PM | 7:51 PM | 8:19 PM | 13h 38m |
| September | 6:14 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 | 7:42 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 Maclure 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
Drones: Drones may not take off from or land in federally designated wilderness, where mechanized equipment is prohibited under the Wilderness Act.
Nearby photo spots
Other locations within 25 km of Maclure Glacier, closest first.
Mountain Peak
Mountain Peak
Glacier
Mountain Pass
Lake
Mountain Pass
Mountain Peak
LakeMountain PeakCampgrounds nearby (Recreation.gov)
- Silver Lake Campground June Lake (Ca)14.3 km (8.9 mi) · reservable
- Tuolumne Meadows Campground15.4 km (9.6 mi) · reservable
- Reversed Creek Campground17.7 km (11.0 mi) · reservable
- Gull Lake Campground17.7 km (11.0 mi) · reservable
- Agnew Meadows Group Camp18.4 km (11.4 mi) · reservable
FAQ
When is the best time to photograph Maclure Glacier?
What time is golden hour at Maclure Glacier?
Where does the sun rise and set at Maclure Glacier?
Can you see the Milky Way from Maclure Glacier?
Do you need a permit to photograph at Maclure Glacier?
How far is Maclure 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.