Optima National Wildlife Refuge is a national wildlife refuge in Texas County, Oklahoma. The nearest town is Hooker, about 24 km (15 mi) away (Optima National Wildlife Refuge lies S of town).
Located in the middle of the Oklahoma panhandle, the 4,333-acre (17.54 km2) Optima National Wildlife Refuge is made up of grasslands and wooded bottomland on the Coldwater Creek arm of the Optima Lake project. The 8,062-acre Optima Wildlife Management Area, an Oklahoma state-managed hunting area, sits adjacent on the Beaver River arm of the Optima Lake project.From the Wikipedia article “Optima National Wildlife Refuge”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Optima National Wildlife Refuge 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) | 7:49 AM | 90° E | 7:57 PM | 271° W | 53° | 12h 08m |
| June solstice (Jun 21) | 6:27 AM | 60° ENE | 9:07 PM | 301° WNW | 77° | 14h 40m |
| September equinox (Sep 22) | 7:33 AM | 89° E | 7:43 PM | 271° W | 54° | 12h 10m |
| December solstice (Dec 21) | 7:54 AM | 119° ESE | 5:33 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
Wildlife is most active in the first and last two hours of daylight — exactly when the light is warmest.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 7:29 AM | 7:57 AM | 8:36 AM | 5:14 PM | 5:53 PM | 6:21 PM | 9h 56m |
| February | 7:08 AM | 7:34 AM | 8:10 AM | 5:50 PM | 6:26 PM | 6:52 PM | 10h 52m |
| March | 7:31 AM | 7:57 AM | 8:31 AM | 7:18 PM | 7:53 PM | 8:18 PM | 11h 56m |
| April | 6:45 AM | 7:12 AM | 7:46 AM | 7:45 PM | 8:19 PM | 8:46 PM | 13h 08m |
| May | 6:10 AM | 6:39 AM | 7:15 AM | 8:09 PM | 8:46 PM | 9:14 PM | 14h 07m |
| June | 5:56 AM | 6:27 AM | 7:05 AM | 8:27 PM | 9:06 PM | 9:36 PM | 14h 39m |
| July | 6:09 AM | 6:39 AM | 7:16 AM | 8:27 PM | 9:04 PM | 9:34 PM | 14h 26m |
| August | 6:36 AM | 7:03 AM | 7:38 AM | 8:02 PM | 8:37 PM | 9:05 PM | 13h 34m |
| September | 7:02 AM | 7:28 AM | 8:02 AM | 7:20 PM | 7:54 PM | 8:20 PM | 12h 26m |
| October | 7:27 AM | 7:53 AM | 8:28 AM | 6:35 PM | 7:10 PM | 7:36 PM | 11h 17m |
| November | 6:56 AM | 7:24 AM | 8:01 AM | 4:59 PM | 5:37 PM | 6:05 PM | 10h 14m |
| December | 7:22 AM | 7:51 AM | 8:31 AM | 4:51 PM | 5:31 PM | 6:00 PM | 9h 40m |
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 Optima National Wildlife Refuge, 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 2 (typical truly dark site), which is excellent for astrophotography.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | 0° | — |
| February | 5:33 AM – 6:03 AM | 0.5 | 14° | SE → SE |
| March | 4:49 AM – 6:29 AM | 1.7 | 21° | SE → SSE |
| April | 2:41 AM – 5:31 AM | 2.8 | 24° | SE → S |
| May | 12:48 AM – 4:48 AM | 4.0 | 24° | SE → SSW |
| June | 10:58 PM – 4:28 AM | 5.5 | 24° | SE → SW |
| July | 10:52 PM – 3:02 AM | 4.2 | 24° | SSE → SW |
| August | 10:13 PM – 1:03 AM | 2.8 | 24° | S → SW |
| September | 9:22 PM – 11:02 PM | 1.7 | 21° | SSW → SW |
| October | 8:36 PM – 9:06 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: 2 Bortle 2 — Typical truly dark site. The summer Milky Way shows rich structure; clouds look like black holes in the stars. Modeled zenith brightness ≈ 21.87 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show September as the clearest month (about 35% average cloud cover) and February as the cloudiest (55%). 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 | 76 | 87 | 93 | 99 | 105 | 114 | 112 | 110 | 104 | 96 | 85 | 75 |
| Low °F | 4 | 3 | 11 | 21 | 31 | 47 | 57 | 53 | 36 | 19 | 16 | 4 |
| Precip. (in) | 0.5 | 0.5 | 1.0 | 1.6 | 2.2 | 2.8 | 2.4 | 2.8 | 1.6 | 1.7 | 0.6 | 0.7 |
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 national wildlife refuge
- Stay on designated routes and keep a respectful distance — if an animal changes behavior, you are too close.
- A 400–600 mm lens (or a crop body) is the usual tool for birds.
- Fast shutter speeds (1/2000 s+) freeze wingbeats; raise ISO rather than lose the shot.
- Migration peaks bring the largest concentrations — see the birding calendar for this state.
- Use auto-loop roads as mobile blinds; animals often tolerate vehicles more than people on foot.
- Tell someone where you're going in remote areas and carry the ten essentials.
Season: Spring and autumn migration are the highlights; winter brings waterfowl to many southern refuges.
Suggested gear: Telephoto lens (400 mm+), Bean bag for car window, Binoculars. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Permits, drones & access
Drones: Launching or landing drones on National Wildlife Refuge lands generally requires a special use permit from the refuge manager, and wildlife disturbance rules apply everywhere.
FAQ
When is the best time to photograph Optima National Wildlife Refuge?
What time is golden hour at Optima National Wildlife Refuge?
Where does the sun rise and set at Optima National Wildlife Refuge?
Can you see the Milky Way from Optima National Wildlife Refuge?
Do you need a permit to photograph at Optima National Wildlife Refuge?
How far is Optima National Wildlife Refuge from Hooker?
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.