Located in Ventura County, California, Hopper Mountain National Wildlife Refuge is a national wildlife refuge. The nearest town is Piru, about 7.2 km (4.5 mi) away (Hopper Mountain National Wildlife Refuge lies NW of town).
Hopper Mountain National Wildlife Refuge is located in the Topatopa Mountains of Ventura County, in southern California. It is bordered by the Los Padres National Forest and the Sespe Condor Sanctuary to the north. The 2,471-acre (10.00 km2) refuge was established in 1974 to protect the endangered California condor, its habitat, and other wildlife resources. The refuge is in rugged, mountainous terrain. Primary habitats include annual grasslands, interspersed with oak and California black walnut groves, with chaparral on the steeper slopes, natural water springs and riparian habitat, and a freshwater marsh. The California black walnut community is considered to be a unique habitat in California, and is recorded in the State Natural Heritage Database. The refuge provides habitat for more than 130 species of birds, mammals, and reptiles, including the southwestern pond turtle—a...From the Wikipedia article “Hopper Mountain National Wildlife Refuge”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Hopper Mountain National Wildlife Refuge the sunrise point swings a long way through the year: about 61° (ENE) at the June solstice and 118° (ESE) in late December. Sunset moves from 300° (WNW) in June to 242° (WSW) in December, and the midday sun climbs to 79° in summer but only 32° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:00 AM | 90° E | 7:07 PM | 271° W | 55° | 12h 08m |
| June solstice (Jun 21) | 5:44 AM | 61° ENE | 8:12 PM | 300° WNW | 79° | 14h 28m |
| September equinox (Sep 22) | 6:44 AM | 89° E | 6:54 PM | 271° W | 56° | 12h 09m |
| December solstice (Dec 21) | 6:59 AM | 118° ESE | 4:50 PM | 242° WSW | 32° | 9h 51m |
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 | 6:35 AM | 7:02 AM | 7:40 AM | 4:31 PM | 5:09 PM | 5:36 PM | 10h 06m |
| February | 6:16 AM | 6:42 AM | 7:16 AM | 5:05 PM | 5:39 PM | 6:05 PM | 10h 58m |
| March | 6:42 AM | 7:07 AM | 7:40 AM | 6:30 PM | 7:04 PM | 7:29 PM | 11h 57m |
| April | 5:59 AM | 6:25 AM | 6:58 AM | 6:54 PM | 7:27 PM | 7:53 PM | 13h 03m |
| May | 5:26 AM | 5:54 AM | 6:29 AM | 7:16 PM | 7:51 PM | 8:19 PM | 13h 58m |
| June | 5:14 AM | 5:43 AM | 6:20 AM | 7:33 PM | 8:10 PM | 8:40 PM | 14h 27m |
| July | 5:26 AM | 5:55 AM | 6:31 AM | 7:33 PM | 8:09 PM | 8:38 PM | 14h 14m |
| August | 5:51 AM | 6:17 AM | 6:52 AM | 7:10 PM | 7:44 PM | 8:11 PM | 13h 27m |
| September | 6:14 AM | 6:39 AM | 7:13 AM | 6:31 PM | 7:04 PM | 7:29 PM | 12h 24m |
| October | 6:36 AM | 7:01 AM | 7:35 AM | 5:48 PM | 6:22 PM | 6:47 PM | 11h 21m |
| November | 6:03 AM | 6:30 AM | 7:06 AM | 4:16 PM | 4:52 PM | 5:19 PM | 10h 22m |
| December | 6:28 AM | 6:56 AM | 7:34 AM | 4:09 PM | 4:47 PM | 5:15 PM | 9h 52m |
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 Hopper Mountain National Wildlife Refuge, the Milky Way core is visible in a dark sky from February through October. June gives the longest window (about 6.0 hours on a moonless night), and the core peaks around 27° above the southern horizon. Our light-pollution model puts the sky at about Bortle 5 (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 | — | 0° | — |
| February | 4:33 AM – 5:13 AM | 0.7 | 16° | SE → SE |
| March | 3:47 AM – 5:37 AM | 1.8 | 23° | SE → SSE |
| April | 1:45 AM – 4:45 AM | 3.0 | 26° | SE → S |
| May | 11:49 PM – 4:09 AM | 4.3 | 27° | SE → SSW |
| June | 9:56 PM – 3:56 AM | 6.0 | 27° | SE → SW |
| July | 9:51 PM – 2:31 AM | 4.7 | 27° | SSE → SW |
| August | 9:16 PM – 12:26 AM | 3.2 | 26° | S → SW |
| September | 8:28 PM – 10:18 PM | 1.8 | 23° | SSW → SW |
| October | 7:45 PM – 8:25 PM | 0.7 | 16° | SW → SW |
| November | Below 10° in darkness | — | 2° | — |
| 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: 5 Bortle 5 — Suburban sky. The Milky Way is weak near the horizon and washed out overhead; long exposures pick up a sky glow. Modeled zenith brightness ≈ 19.84 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show August as the clearest month (about 14% average cloud cover) and January as the cloudiest (42%). 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 | 80 | 84 | 87 | 93 | 99 | 109 | 110 | 107 | 112 | 101 | 89 | 80 |
| Low °F | 24 | 25 | 26 | 30 | 36 | 42 | 50 | 51 | 43 | 35 | 27 | 24 |
| Precip. (in) | 2.9 | 3.1 | 1.9 | 0.8 | 0.4 | 0.0 | 0.1 | 0.0 | 0.1 | 0.7 | 1.0 | 2.4 |
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 national wildlife refuge
- 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.
- 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.
- Shoot RAW to keep the most latitude for high-contrast sunrise and sunset scenes.
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.
Nearby photo spots
Other locations within 40 km of Hopper Mountain National Wildlife Refuge, closest first.
Lake
Canyon
WaterfallWaterfall
Hot Spring
Wilderness Area
Hot Spring
Lake
State ParkCampgrounds nearby (Recreation.gov)
- Pyramid Lake - Los Alamos Campground23 km (14 mi) · reservable
- Pyramid Lake - Emigrant Landing Day Use Area23 km (14 mi) · reservable
FAQ
When is the best time to photograph Hopper Mountain National Wildlife Refuge?
What time is golden hour at Hopper Mountain National Wildlife Refuge?
Where does the sun rise and set at Hopper Mountain National Wildlife Refuge?
Can you see the Milky Way from Hopper Mountain National Wildlife Refuge?
Do you need a permit to photograph at Hopper Mountain National Wildlife Refuge?
How far is Hopper Mountain National Wildlife Refuge from Piru?
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.