Located in Coconino County, Arizona, Riordan Mansion State Historic Park is a state park. It sits roughly 1.2 km (0.7 mi) SSW of Flagstaff. It is listed on the National Register of Historic Places.
Riordan Mansion State Historic Park is a historic site in Flagstaff, Arizona, bordering Northern Arizona University, that preserves the duplex mansion of lumber barons Timothy and Michael Riordan.From the Wikipedia article “Riordan Mansion State Historic Park”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Riordan Mansion State Historic 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 300° (WNW) in June to 242° (WSW) in December, and the midday sun climbs to 78° in summer but only 31° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 6:31 AM | 90° E | 6:39 PM | 271° W | 55° | 12h 08m |
| June solstice (Jun 21) | 5:13 AM | 60° ENE | 7:45 PM | 300° WNW | 78° | 14h 32m |
| September equinox (Sep 22) | 6:15 AM | 89° E | 6:25 PM | 271° W | 55° | 12h 10m |
| December solstice (Dec 21) | 7:32 AM | 119° ESE | 5:19 PM | 242° WSW | 31° | 9h 47m |
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 | 7:08 AM | 7:35 AM | 8:13 AM | 5:00 PM | 5:38 PM | 6:06 PM | 10h 03m |
| February | 6:48 AM | 7:14 AM | 7:49 AM | 5:35 PM | 6:10 PM | 6:36 PM | 10h 56m |
| March | 6:13 AM | 6:38 AM | 7:12 AM | 6:01 PM | 6:35 PM | 7:00 PM | 11h 56m |
| April | 5:29 AM | 5:55 AM | 6:29 AM | 6:25 PM | 6:59 PM | 7:26 PM | 13h 04m |
| May | 4:55 AM | 5:24 AM | 5:59 AM | 6:48 PM | 7:24 PM | 7:52 PM | 14h 01m |
| June | 4:43 AM | 5:13 AM | 5:50 AM | 7:06 PM | 7:43 PM | 8:13 PM | 14h 31m |
| July | 4:55 AM | 5:24 AM | 6:01 AM | 7:05 PM | 7:42 PM | 8:11 PM | 14h 18m |
| August | 5:20 AM | 5:47 AM | 6:22 AM | 6:42 PM | 7:17 PM | 7:44 PM | 13h 30m |
| September | 5:45 AM | 6:10 AM | 6:44 AM | 6:02 PM | 6:35 PM | 7:01 PM | 12h 25m |
| October | 6:08 AM | 6:33 AM | 7:08 AM | 5:19 PM | 5:53 PM | 6:18 PM | 11h 19m |
| November | 6:35 AM | 7:02 AM | 7:39 AM | 4:45 PM | 5:22 PM | 5:49 PM | 10h 20m |
| December | 7:00 AM | 7:29 AM | 8:08 AM | 4:38 PM | 5:17 PM | 5:45 PM | 9h 48m |
Local time (America/Phoenix), 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 Riordan Mansion State Historic Park, the Milky Way core is visible in a dark sky from February through October. June gives the longest window (about 5.8 hours on a moonless night), and the core peaks around 26° above the southern horizon. Our light-pollution model puts the sky at about Bortle 7 (suburban / urban transition), 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 | 5:15 AM – 5:45 AM | 0.5 | 15° | SE → SE |
| March | 3:19 AM – 5:09 AM | 1.8 | 23° | SE → SSE |
| April | 1:19 AM – 4:19 AM | 3.0 | 26° | SE → S |
| May | 11:24 PM – 3:34 AM | 4.2 | 26° | SE → SSW |
| June | 9:31 PM – 3:21 AM | 5.8 | 26° | SE → SW |
| July | 9:27 PM – 1:57 AM | 4.5 | 26° | SSE → SW |
| August | 8:50 PM – 11:50 PM | 3.0 | 26° | S → SW |
| September | 8:01 PM – 9:51 PM | 1.8 | 23° | SSW → SW |
| October | 7:18 PM – 7:58 PM | 0.7 | 15° | SW → SW |
| November | Below 10° in darkness | — | 2° | — |
| 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: 7 Bortle 7 — Suburban / urban transition. The whole sky has a grey-white glow; the Milky Way is invisible to the eye. Modeled zenith brightness ≈ 18.52 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show June as the clearest month (about 24% average cloud cover) and July 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 | 69 | 73 | 84 | 90 | 101 | 106 | 106 | 104 | 102 | 91 | 80 | 71 |
| Low °F | 4 | 3 | 14 | 22 | 28 | 39 | 53 | 50 | 37 | 18 | 12 | 7 |
| Precip. (in) | 1.2 | 1.2 | 0.8 | 0.6 | 0.5 | 0.2 | 2.0 | 2.3 | 1.2 | 1.0 | 1.0 | 1.4 |
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
- 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.
- Tell someone where you're going in remote areas and carry the ten essentials.
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 Riordan Mansion State Historic Park, closest first.
Dark Sky Place
Botanical Garden
Mountain Peak
Fire Lookout
Scenic Viewpoint
Mountain Peak
Mountain Peak
VolcanoMountain PeakCampgrounds nearby (Recreation.gov)
- Canyon Vista9.1 km (5.6 mi) · reservable
- Little Elden Springs Horsecamp12.7 km (7.9 mi) · reservable
- Lockett Meadow Campground19.2 km (11.9 mi)
- Lakeview Campground (Az)20 km (13 mi) · reservable
- Pine Flat Campground West21 km (13 mi) · reservable
FAQ
When is the best time to photograph Riordan Mansion State Historic Park?
What time is golden hour at Riordan Mansion State Historic Park?
Where does the sun rise and set at Riordan Mansion State Historic Park?
Can you see the Milky Way from Riordan Mansion State Historic Park?
Do you need a permit to photograph at Riordan Mansion State Historic Park?
How far is Riordan Mansion State Historic Park from Flagstaff?
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.