Caverns of Sonora — a cave in Sutton County, Texas at about 674 m (2,211 ft) above sea level — is a classic subject for landscape photographers. It sits roughly 16.2 km (10.1 mi) W of Sonora.
The Caverns of Sonora, a National Natural Landmark, is a unique cave located 8 miles (13 km) west of the small city of Sonora, the seat of Sutton County, Texas. It is a world-class cave because of its stunning array of calcite crystal formations, especially helictites. These helictites are found in extreme abundance, often with a rare purity and complexity. One formation is so densely packed with them, it has been dubbed the "snake pit". The founder of the National Speleological Society, Bill Stephenson, said of the cave after his first visit: "This is the most indescribably beautiful cave in the world, its beauty cannot be exaggerated, not even by a Texan."From the Wikipedia article “Caverns of Sonora”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Caverns of Sonora the sunrise point swings a long way through the year: about 62° (ENE) at the June solstice and 117° (ESE) in late December. Sunset moves from 298° (WNW) in June to 243° (WSW) in December, and the midday sun climbs to 83° in summer but only 36° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:48 AM | 90° E | 7:55 PM | 271° W | 59° | 12h 07m |
| June solstice (Jun 21) | 6:42 AM | 62° ENE | 8:49 PM | 298° WNW | 83° | 14h 07m |
| September equinox (Sep 22) | 7:32 AM | 89° E | 7:41 PM | 271° W | 60° | 12h 09m |
| December solstice (Dec 21) | 7:37 AM | 117° ESE | 5:47 PM | 243° WSW | 36° | 10h 10m |
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
Caves are lit artificially — show caves have fixed lighting, so a fast lens and high ISO beat flash, which flattens formations.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 7:16 AM | 7:42 AM | 8:17 AM | 5:29 PM | 6:05 PM | 6:31 PM | 10h 23m |
| February | 7:00 AM | 7:25 AM | 7:58 AM | 5:59 PM | 6:32 PM | 6:57 PM | 11h 07m |
| March | 7:30 AM | 7:54 AM | 8:26 AM | 7:20 PM | 7:52 PM | 8:16 PM | 11h 58m |
| April | 6:52 AM | 7:16 AM | 7:49 AM | 7:39 PM | 8:11 PM | 8:36 PM | 12h 55m |
| May | 6:23 AM | 6:50 AM | 7:24 AM | 7:57 PM | 8:31 PM | 8:58 PM | 13h 42m |
| June | 6:14 AM | 6:41 AM | 7:17 AM | 8:13 PM | 8:48 PM | 9:16 PM | 14h 07m |
| July | 6:25 AM | 6:52 AM | 7:26 AM | 8:13 PM | 8:48 PM | 9:15 PM | 13h 56m |
| August | 6:45 AM | 7:11 AM | 7:44 AM | 7:54 PM | 8:27 PM | 8:52 PM | 13h 16m |
| September | 7:04 AM | 7:28 AM | 8:00 AM | 7:19 PM | 7:50 PM | 8:14 PM | 12h 22m |
| October | 7:22 AM | 7:46 AM | 8:19 AM | 6:41 PM | 7:13 PM | 7:37 PM | 11h 27m |
| November | 6:45 AM | 7:10 AM | 7:45 AM | 5:13 PM | 5:47 PM | 6:13 PM | 10h 37m |
| December | 7:07 AM | 7:34 AM | 8:10 AM | 5:08 PM | 5:45 PM | 6:11 PM | 10h 11m |
Local time (America/Chicago), 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 Caverns of Sonora, the Milky Way core is visible in a dark sky from February through October. June gives the longest window (about 6.5 hours on a moonless night), and the core peaks around 31° above the southern horizon. Our light-pollution model puts the sky at about Bortle 1 (excellent dark-sky site), which is excellent for astrophotography.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | 1° | — |
| February | 5:03 AM – 6:03 AM | 1.0 | 19° | SE → SE |
| March | 4:12 AM – 6:32 AM | 2.3 | 27° | SE → SSE |
| April | 2:15 AM – 5:45 AM | 3.5 | 31° | SE → S |
| May | 12:12 AM – 5:12 AM | 5.0 | 31° | SE → SSW |
| June | 10:25 PM – 4:55 AM | 6.5 | 31° | SE → SW |
| July | 10:22 PM – 3:32 AM | 5.2 | 31° | SSE → SW |
| August | 9:53 PM – 1:33 AM | 3.7 | 31° | S → SW |
| September | 9:11 PM – 11:31 PM | 2.3 | 28° | SSW → SW |
| October | 8:33 PM – 9:33 PM | 1.0 | 19° | SW → SW |
| November | Below 10° in darkness | — | 4° | — |
| December | Below 10° in darkness | — | -18° | — |
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: 1 Bortle 1 — Excellent dark-sky site. The Milky Way casts faint shadows; zodiacal light and airglow are obvious. Modeled zenith brightness ≈ 21.89 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show October as the clearest month (about 38% average cloud cover) and February as the cloudiest (52%). August is the warmest month and January 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 | 83 | 93 | 95 | 103 | 107 | 108 | 109 | 108 | 105 | 99 | 90 | 84 |
| Low °F | 18 | 13 | 20 | 30 | 37 | 58 | 62 | 60 | 46 | 27 | 22 | 15 |
| Precip. (in) | 0.8 | 1.0 | 1.6 | 1.6 | 2.9 | 2.4 | 1.8 | 2.3 | 2.8 | 2.5 | 1.2 | 0.8 |
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 cave
- Use manual focus with focus peaking in low light.
- Never touch formations — skin oils stop their growth.
- Follow White-nose Syndrome decontamination rules where posted to protect bats.
- Many show caves restrict tripods on tours; ask in advance or bring a small beanbag.
- Tell someone where you're going in remote areas and carry the ten essentials.
Season: Cave interiors stay at a constant temperature year-round; summer tours fill up, so book ahead.
Suggested gear: Fast lens (f/1.8–f/2.8), High-ISO camera, Small beanbag. Work out exposures with the depth of field, ND filter and NPF rule calculators.
FAQ
When is the best time to photograph Caverns of Sonora?
What time is golden hour at Caverns of Sonora?
Where does the sun rise and set at Caverns of Sonora?
Can you see the Milky Way from Caverns of Sonora?
Do you need a permit to photograph at Caverns of Sonora?
How far is Caverns of Sonora from Sonora?
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.