Natural Tunnel State Park is a cave in Scott County, Virginia. It sits roughly 16.2 km (10.1 mi) WNW of Gate City.
Natural Tunnel State Park is a Virginia state park, centered on the Natural Tunnel, a massive naturally formed cave that is so large it is used as a railroad tunnel. It is located in the Appalachian Mountains near Duffield in Scott County, Virginia. The Natural Tunnel, which is up to 200 feet (61 m) wide and 80 feet (24 m) high, began to form more than a million years ago when groundwater bearing carbonic acid percolated through crevices and slowly dissolved limestone and dolomite bedrock. A small river, which is now called Stock Creek, was diverted underground and it continued to erode the tunnel over many millennia. The walls of the tunnel show evidence of prehistoric life. Many fossils have been found in the creek bed and in the tunnel walls.From the Wikipedia article “Natural Tunnel State Park”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Natural Tunnel State Park the sunrise point swings a long way through the year: about 60° (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 77° in summer but only 30° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:35 AM | 90° E | 7:43 PM | 271° W | 53° | 12h 08m |
| June solstice (Jun 21) | 6:13 AM | 60° ENE | 8:54 PM | 301° WNW | 77° | 14h 40m |
| September equinox (Sep 22) | 7:20 AM | 89° E | 7:30 PM | 271° W | 54° | 12h 10m |
| December solstice (Dec 21) | 7:40 AM | 119° ESE | 5:19 PM | 241° WSW | 30° | 9h 39m |
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 | 7:15 AM | 7:43 AM | 8:22 AM | 5:00 PM | 5:39 PM | 6:07 PM | 9h 56m |
| February | 6:54 AM | 7:20 AM | 7:56 AM | 5:36 PM | 6:12 PM | 6:38 PM | 10h 52m |
| March | 7:17 AM | 7:43 AM | 8:17 AM | 7:04 PM | 7:39 PM | 8:04 PM | 11h 56m |
| April | 6:31 AM | 6:58 AM | 7:32 AM | 7:31 PM | 8:05 PM | 8:32 PM | 13h 08m |
| May | 5:56 AM | 6:25 AM | 7:01 AM | 7:55 PM | 8:32 PM | 9:01 PM | 14h 07m |
| June | 5:42 AM | 6:13 AM | 6:51 AM | 8:14 PM | 8:52 PM | 9:23 PM | 14h 39m |
| July | 5:55 AM | 6:24 AM | 7:02 AM | 8:13 PM | 8:51 PM | 9:20 PM | 14h 26m |
| August | 6:22 AM | 6:49 AM | 7:24 AM | 7:48 PM | 8:24 PM | 8:51 PM | 13h 35m |
| September | 6:48 AM | 7:14 AM | 7:48 AM | 7:06 PM | 7:40 PM | 8:06 PM | 12h 26m |
| October | 7:13 AM | 7:39 AM | 8:14 AM | 6:21 PM | 6:56 PM | 7:22 PM | 11h 17m |
| November | 6:42 AM | 7:10 AM | 7:48 AM | 4:45 PM | 5:23 PM | 5:51 PM | 10h 13m |
| December | 7:08 AM | 7:37 AM | 8:17 AM | 4:37 PM | 5:17 PM | 5:46 PM | 9h 40m |
Local time (America/New York), 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 Natural Tunnel State Park, the Milky Way core is visible in a dark sky from February through October. 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 3 (rural sky), good enough for detailed Milky Way images.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | 0° | — |
| February | 5:19 AM – 5:49 AM | 0.5 | 14° | SE → SE |
| March | 4:35 AM – 6:15 AM | 1.7 | 21° | SE → SSE |
| April | 2:27 AM – 5:17 AM | 2.8 | 24° | SE → S |
| May | 12:34 AM – 4:34 AM | 4.0 | 24° | SE → SSW |
| June | 10:44 PM – 4:14 AM | 5.5 | 24° | SE → SW |
| July | 10:38 PM – 2:48 AM | 4.2 | 24° | SSE → SW |
| August | 9:59 PM – 12:49 AM | 2.8 | 24° | S → SW |
| September | 9:08 PM – 10:48 PM | 1.7 | 21° | SSW → SW |
| October | 8:22 PM – 8:52 PM | 0.5 | 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: 3 Bortle 3 — Rural sky. Some light domes sit on the horizon, but the Milky Way still looks complex overhead. Modeled zenith brightness ≈ 21.47 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show September as the clearest month (about 50% average cloud cover) and February as the cloudiest (70%). July 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 | 71 | 74 | 80 | 83 | 90 | 102 | 101 | 99 | 97 | 95 | 81 | 74 |
| Low °F | -2 | -3 | 7 | 20 | 33 | 41 | 51 | 49 | 37 | 23 | 15 | 4 |
| Precip. (in) | 3.4 | 4.1 | 3.7 | 4.3 | 4.1 | 4.2 | 5.0 | 3.8 | 3.5 | 3.0 | 3.4 | 3.8 |
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.
- Check road and trail conditions with the managing agency before you go.
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.
Nearby photo spots
Other locations within 25 km of Natural Tunnel State Park, closest first.
Campgrounds nearby (Recreation.gov)
- Cave Springs (Va)19.5 km (12.1 mi) · reservable
- High Knob Campground23 km (15 mi) · reservable
- Bark Camp27 km (17 mi) · reservable
FAQ
When is the best time to photograph Natural Tunnel State Park?
What time is golden hour at Natural Tunnel State Park?
Where does the sun rise and set at Natural Tunnel State Park?
Can you see the Milky Way from Natural Tunnel State Park?
Do you need a permit to photograph at Natural Tunnel State Park?
How far is Natural Tunnel State Park from Gate City?
Sources
Location data: Wikidata, 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.