Mount Thayer is a mountain peak in Santa Clara County, California at about 1,060 m (3,478 ft) above sea level. The nearest town is Lexington Hills, about 4.8 km (3.0 mi) away (Mount Thayer lies E of town).
Mount Thayer is a mountain in the Santa Cruz mountain range located in Santa Clara County, California. The summit is in a section of the abandoned Almaden Air Force Station, 1.5 miles northwest of Mount Umunhum. The elevation of the summit is at 3,502 feet (1,067 m) feet. An old derelict building, surrounded by telephone poles, is located on the summit. Mount Thayer, along with the surrounding property, is off limits to the public.From the Wikipedia article “Mount Thayer”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Mount Thayer the sunrise point swings a long way through the year: about 59° (ENE) at the June solstice and 119° (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) | 7:12 AM | 90° E | 7:20 PM | 271° W | 53° | 12h 08m |
| June solstice (Jun 21) | 5:49 AM | 59° ENE | 8:32 PM | 301° WNW | 76° | 14h 43m |
| September equinox (Sep 22) | 6:56 AM | 89° E | 7:06 PM | 271° W | 53° | 12h 10m |
| December solstice (Dec 21) | 7:19 AM | 119° ESE | 4:55 PM | 241° WSW | 29° | 9h 36m |
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
Summits catch first and last light — alpenglow can turn rock pink or orange minutes before sunrise and after sunset while valleys stay in shadow.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:53 AM | 7:21 AM | 8:00 AM | 4:35 PM | 5:14 PM | 5:43 PM | 9h 53m |
| February | 6:31 AM | 6:57 AM | 7:34 AM | 5:12 PM | 5:48 PM | 6:15 PM | 10h 51m |
| March | 6:54 AM | 7:20 AM | 7:54 AM | 6:41 PM | 7:15 PM | 7:41 PM | 11h 56m |
| April | 6:07 AM | 6:34 AM | 7:09 AM | 7:08 PM | 7:43 PM | 8:10 PM | 13h 09m |
| May | 5:31 AM | 6:00 AM | 6:37 AM | 7:33 PM | 8:10 PM | 8:39 PM | 14h 10m |
| June | 5:17 AM | 5:48 AM | 6:27 AM | 7:51 PM | 8:30 PM | 9:01 PM | 14h 42m |
| July | 5:30 AM | 6:00 AM | 6:38 AM | 7:50 PM | 8:28 PM | 8:59 PM | 14h 28m |
| August | 5:57 AM | 6:25 AM | 7:01 AM | 7:25 PM | 8:01 PM | 8:29 PM | 13h 36m |
| September | 6:25 AM | 6:51 AM | 7:25 AM | 6:43 PM | 7:17 PM | 7:43 PM | 12h 26m |
| October | 6:50 AM | 7:16 AM | 7:51 AM | 5:57 PM | 6:32 PM | 6:58 PM | 11h 16m |
| November | 6:20 AM | 6:48 AM | 7:26 AM | 4:21 PM | 4:59 PM | 5:27 PM | 10h 11m |
| December | 6:46 AM | 7:15 AM | 7:56 AM | 4:12 PM | 4:52 PM | 5:21 PM | 9h 37m |
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 Mount Thayer, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 5.5 hours on a moonless night), and the core peaks around 24° above the southern horizon. Our light-pollution model puts the sky at about Bortle 6 (bright suburban sky), so expect visible sky glow; drive away from towns for better results.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -1° | — |
| February | 5:06 AM – 5:26 AM | 0.3 | 14° | SE → SE |
| March | 4:12 AM – 5:42 AM | 1.5 | 20° | SE → SSE |
| April | 2:05 AM – 4:55 AM | 2.8 | 24° | SE → S |
| May | 12:14 AM – 4:14 AM | 4.0 | 24° | SE → SSW |
| June | 10:24 PM – 3:54 AM | 5.5 | 24° | SE → SW |
| July | 10:18 PM – 2:28 AM | 4.2 | 24° | SSE → SW |
| August | 9:38 PM – 12:28 AM | 2.8 | 24° | S → SW |
| September | 8:45 PM – 10:25 PM | 1.7 | 20° | SSW → SW |
| October | 7:59 PM – 8:19 PM | 0.3 | 14° | 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: 6 Bortle 6 — Bright suburban sky. The Milky Way is only visible near the zenith; the sky glows grey-orange in photos. Modeled zenith brightness ≈ 19.33 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show July as the clearest month (about 12% average cloud cover) and January 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 | 74 | 77 | 85 | 95 | 108 | 110 | 116 | 113 | 114 | 103 | 89 | 71 |
| Low °F | 22 | 27 | 29 | 32 | 39 | 43 | 49 | 50 | 46 | 38 | 27 | 24 |
| Precip. (in) | 2.9 | 3.1 | 2.4 | 1.3 | 0.5 | 0.1 | 0.0 | 0.0 | 0.1 | 0.8 | 1.7 | 3.6 |
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 mountain peak
- Photograph the peak from a lake, meadow or ridge at sunrise when the face that looks east lights up first.
- Long lenses compress ridgelines; shoot the peak from several miles away to make it look massive.
- Afternoon thunderstorms are common in summer at high elevations — plan summit hikes for early morning.
- Snow on the summit holds detail best when you expose for the highlights and lift shadows later.
- Check road and trail conditions with the managing agency before you go.
Season: Early summer keeps snow on the peaks with green valleys below; autumn adds aspen or larch color in many ranges.
Suggested gear: Telephoto lens, Lightweight tripod, Warm layers, Microspikes in shoulder seasons. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Mount Thayer, closest first.
Mountain Peak
Ghost Town
Ghost Town
Ghost Town
Ghost Town
Ghost Town
Ghost Town
Ghost Town
Mountain PeakFAQ
When is the best time to photograph Mount Thayer?
What time is golden hour at Mount Thayer?
Where does the sun rise and set at Mount Thayer?
Can you see the Milky Way from Mount Thayer?
Do you need a permit to photograph at Mount Thayer?
How far is Mount Thayer from Lexington Hills?
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.