Trione-Annadel State Park is a state park in Sonoma County, California. It sits roughly 7.1 km (4.4 mi) WNW of Kenwood.
Trione-Annadel State Park is a California state park in the United States. It is situated at the northern edge of Sonoma Valley and is adjacent to Spring Lake Regional Park in Santa Rosa. It offers many recreational activities within its 5,092-acre (2,061 ha) property. The rock formations of Trione-Annadel have played a central role in its history: its volcanic origins, the Native American use of obsidian, the early 1900s mining of cobblestones, and modern hikers' appreciation of its volcanic rock outcrops. These lands were occupied by the Wappo and Pomo people in prehistoric times, who would have primarily inhabited the riparian zones and the marsh perimeter. Annadel includes what some biologists consider the best example of undisturbed northern oak woodlands in existence. Visitors can enjoy the park's diverse wildlife and scenery during any time of the year but are perhaps most...From the Wikipedia article “Trione-Annadel State Park”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Trione-Annadel State Park 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 240° (WSW) in December, and the midday sun climbs to 75° in summer but only 28° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:15 AM | 90° E | 7:23 PM | 271° W | 51° | 12h 08m |
| June solstice (Jun 21) | 5:48 AM | 59° ENE | 8:38 PM | 301° WNW | 75° | 14h 51m |
| September equinox (Sep 22) | 6:59 AM | 89° E | 7:09 PM | 271° W | 52° | 12h 10m |
| December solstice (Dec 21) | 7:25 AM | 120° ESE | 4:54 PM | 240° WSW | 28° | 9h 29m |
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
State parks often protect a signature feature — a gorge, lake or overlook — that is best in early morning before visitors and harsh light arrive.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:58 AM | 7:27 AM | 8:07 AM | 4:34 PM | 5:14 PM | 5:43 PM | 9h 47m |
| February | 6:35 AM | 7:02 AM | 7:39 AM | 5:12 PM | 5:49 PM | 6:16 PM | 10h 47m |
| March | 6:56 AM | 7:23 AM | 7:58 AM | 6:43 PM | 7:18 PM | 7:44 PM | 11h 55m |
| April | 6:08 AM | 6:35 AM | 7:11 AM | 7:12 PM | 7:47 PM | 8:14 PM | 13h 12m |
| May | 5:30 AM | 6:00 AM | 6:38 AM | 7:38 PM | 8:15 PM | 8:45 PM | 14h 16m |
| June | 5:15 AM | 5:47 AM | 6:26 AM | 7:57 PM | 8:37 PM | 9:08 PM | 14h 50m |
| July | 5:29 AM | 5:59 AM | 6:38 AM | 7:56 PM | 8:35 PM | 9:06 PM | 14h 35m |
| August | 5:58 AM | 6:26 AM | 7:02 AM | 7:30 PM | 8:06 PM | 8:34 PM | 13h 40m |
| September | 6:26 AM | 6:53 AM | 7:28 AM | 6:45 PM | 7:20 PM | 7:47 PM | 12h 27m |
| October | 6:53 AM | 7:20 AM | 7:56 AM | 5:58 PM | 6:34 PM | 7:00 PM | 11h 14m |
| November | 6:25 AM | 6:53 AM | 7:32 AM | 4:20 PM | 4:59 PM | 5:27 PM | 10h 06m |
| December | 6:52 AM | 7:21 AM | 8:03 AM | 4:10 PM | 4:52 PM | 5:21 PM | 9h 30m |
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 Trione-Annadel State Park, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 5.2 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 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 | — | -2° | — |
| February | 5:07 AM – 5:27 AM | 0.3 | 13° | SE → SE |
| March | 4:26 AM – 5:46 AM | 1.3 | 19° | SE → SSE |
| April | 2:21 AM – 4:51 AM | 2.5 | 22° | SE → S |
| May | 12:22 AM – 4:02 AM | 3.7 | 23° | SE → S |
| June | 10:34 PM – 3:44 AM | 5.2 | 23° | SE → SSW |
| July | 10:27 PM – 2:17 AM | 3.8 | 23° | SSE → SW |
| August | 9:44 PM – 12:14 AM | 2.5 | 22° | S → SW |
| September | 8:50 PM – 10:20 PM | 1.5 | 19° | SSW → SW |
| October | 8:01 PM – 8:21 PM | 0.3 | 13° | SW → SW |
| November | Below 10° in darkness | — | 0° | — |
| 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 ≈ 19.3 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show July as the clearest month (about 19% average cloud cover) and December as the cloudiest (57%). 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 | 73 | 75 | 76 | 87 | 100 | 106 | 109 | 107 | 112 | 103 | 87 | 71 |
| Low °F | 25 | 27 | 28 | 30 | 35 | 42 | 48 | 48 | 45 | 37 | 27 | 24 |
| Precip. (in) | 4.7 | 5.1 | 3.7 | 1.9 | 0.8 | 0.2 | 0.0 | 0.0 | 0.1 | 1.3 | 2.9 | 6.2 |
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 state park
- Check park hours: many state parks close at dusk, which affects sunset and night shooting.
- Ask rangers about photography permits for commercial work, models or drones.
- Weekday mornings are the least crowded at popular viewpoints.
- Trail maps often mark overlooks — combine them with the sun azimuth to plan.
- Day-use fees or passes are common; buy them online before arriving.
- Scout in daylight if you plan to shoot at night or before sunrise.
Season: Spring wildflowers and autumn color are peak seasons in most parks.
Suggested gear: Versatile zoom lens, Tripod, Park pass. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Permits, drones & access
Drones: Drone rules in state parks vary by state and even by park — many require a permit or ban recreational drone flights. Check the park's rules and the FAA B4UFLY app before flying.
Nearby photo spots
Other locations within 40 km of Trione-Annadel State Park, closest first.
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Hot SpringFAQ
When is the best time to photograph Trione-Annadel State Park?
What time is golden hour at Trione-Annadel State Park?
Where does the sun rise and set at Trione-Annadel State Park?
Can you see the Milky Way from Trione-Annadel State Park?
Do you need a permit to photograph at Trione-Annadel State Park?
How far is Trione-Annadel State Park from Kenwood?
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.