A flock of Sandhill Cranes landing at Merced National Wildlife Refuge, California, USA.
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37.1791° N120.6370° WBortle 4Los Angeles

Merced National Wildlife Refuge Photography Guide

National Wildlife Refuge in Merced County, California

  • Bortle 4 sky
  • Sunset azimuth 241°–301°
  • Clearest: August
  • Milky Way Mar–Sep
Photo: Lee Eastman of Pacific Southwest Region U.S. Fish and Wildlife Service from Sacramento, US · CC BY 2.0 · source

Merced National Wildlife Refuge — a national wildlife refuge in Merced County, California — is a classic subject for landscape photographers. It sits roughly 18.9 km (11.7 mi) S of Atwater.

The Merced National Wildlife Refuge encompasses 10,262 acres (41.53 km2) of wetlands, native grasslands, vernal pools, and riparian areas in California. It was established in 1951 under the Lea Act to attract wintering waterfowl from adjacent farmland where their foraging was causing crop damage. In the last few decades, changes in agricultural practices and refuge management have reduced these wildlife/crop issues. The refuge plays host to the largest wintering populations of lesser sandhill cranes and Ross's geese within the Pacific Flyway. Each autumn over 20,000 cranes and 60,000 arctic nesting geese terminate their annual migrations from Alaska and Canada to make the refuge home for six months. Here they mingle with thousands of other visiting waterfowl, waterbirds and shorebirds making the refuge a true winter phenomenon.From the Wikipedia article “Merced National Wildlife Refuge”, licensed under CC BY-SA 4.0.
Nearest town
Atwater
18.9 km (11.7 mi)
Sky darkness
Bortle 4
Rural / suburban transition
Clearest month
August
11% cloud
Milky Way peak
June
5.5 h window
Golden hour (Oct)
5:52 PM
sunset 6:27 PM

Light at Merced National Wildlife Refuge

Live
Sunrise
7:16 AM
Sunset
6:20 PM
Golden hour AM
6:59 AM – 7:51 AM
Golden hour PM
5:45 PM – 6:36 PM
Blue hour AM
6:49 AM – 6:59 AM
Blue hour PM
6:36 PM – 6:47 PM
Full darkness
7:47 PM – 5:50 AM
Moon
Waxing Gibbous · 71%
Moonrise / set
3:29 PM / 1:30 AM
Day length
11h 05m
Sunrise azimuth
102°
Sunset azimuth
258°
000306091215182124
NightTwilightBlue hourGolden hourDaylight

Times in America/Los Angeles. Golden hour = sun −4° to +6°; blue hour = −6° to −4°.

Clouds at sunrise & sunset

NWS

Hourly sky cover from the National Weather Service. 20–60% cloud often gives the most colorful sunrises and sunsets.

Sunrise & sunset directions

At Merced National Wildlife Refuge the sunrise point swings a long way through the year: about 59° (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 76° in summer but only 29° in winter.

NESW60°30°
June solsticeEquinoxesDecember solstice
DateSunriseAzimuthSunsetAzimuthNoon sunDaylight
March equinox (Mar 20)7:07 AM90° E7:15 PM271° W53°12h 08m
June solstice (Jun 21)5:43 AM59° ENE8:27 PM301° WNW76°14h 43m
September equinox (Sep 22)6:51 AM89° E7:01 PM271° W53°12h 10m
December solstice (Dec 21)7:13 AM119° ESE4:49 PM241° WSW29°9h 36m

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 startsSunriseGolden hour endsGolden hour startsSunsetBlue hour endsDaylight
January6:48 AM7:16 AM7:55 AM4:30 PM5:09 PM5:38 PM9h 53m
February6:26 AM6:52 AM7:28 AM5:07 PM5:43 PM6:10 PM10h 51m
March6:48 AM7:14 AM7:49 AM6:36 PM7:10 PM7:36 PM11h 56m
April6:02 AM6:29 AM7:04 AM7:03 PM7:38 PM8:05 PM13h 09m
May5:26 AM5:55 AM6:32 AM7:28 PM8:05 PM8:34 PM14h 10m
June5:12 AM5:43 AM6:21 AM7:46 PM8:25 PM8:56 PM14h 42m
July5:25 AM5:55 AM6:33 AM7:45 PM8:23 PM8:53 PM14h 28m
August5:52 AM6:20 AM6:56 AM7:20 PM7:56 PM8:24 PM13h 36m
September6:19 AM6:45 AM7:20 AM6:38 PM7:12 PM7:38 PM12h 26m
October6:45 AM7:11 AM7:46 AM5:52 PM6:27 PM6:53 PM11h 16m
November6:15 AM6:42 AM7:21 AM4:16 PM4:54 PM5:21 PM10h 11m
December6:41 AM7:10 AM7:51 AM4:07 PM4:47 PM5:16 PM9h 37m

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 Merced National Wildlife Refuge, the Milky Way core is visible in a dark sky from March through September. 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 4 (rural / suburban transition), good enough for detailed Milky Way images.

MonthCore visible (15th)HoursMax altitudeDirection
JanuaryBelow 10° in darkness—-1°—
February5:01 AM – 5:21 AM0.314°SE → SE
March4:07 AM – 5:37 AM1.520°SE → SSE
April2:00 AM – 4:50 AM2.824°SE → S
May12:09 AM – 4:09 AM4.024°SE → SSW
June10:19 PM – 3:49 AM5.524°SE → SW
July10:13 PM – 2:23 AM4.224°SSE → SW
August9:33 PM – 12:23 AM2.824°S → SW
September8:40 PM – 10:20 PM1.720°SSW → SW
October7:54 PM – 8:14 PM0.314°SW → SW
NovemberBelow 10° in darkness—1°—
DecemberBelow 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: 4 Bortle 4 — Rural / suburban transition. Light domes are visible in several directions; the Milky Way is clear but lacks detail near the horizon. Modeled zenith brightness ≈ 20.82 mag/arcsec².

Weather & best season

Long-term NASA satellite data for this area show August as the clearest month (about 11% average cloud cover) and January as the cloudiest (59%). 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 (%)

JanFebMarAprMayJunJulAugSepOctNovDec
JanFebMarAprMayJunJulAugSepOctNovDec
High °F767988971101131191151151058775
Low °F252831354145535249412824
Precip. (in)3.03.12.61.60.70.10.00.00.11.01.83.5

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 Merced National Wildlife Refuge, closest first.

San Luis National Wildlife RefugeNational Wildlife Refuge
San Luis National Wildlife Refuge15 km away · Merced County
National Wildlife Refuge
Kesterson National Wildlife Refuge24 km away · Merced County

FAQ

When is the best time to photograph Merced National Wildlife Refuge?
August has the clearest skies on average; june is best for the milky way core. For light, plan around the first and last hour of sun. Spring and autumn migration are the highlights; winter brings waterfowl to many southern refuges.
What time is golden hour at Merced National Wildlife Refuge?
In October the evening golden hour starts around 5:52 PM and ends after sunset at about 6:27 PM; the morning golden hour lasts until about 7:46 AM. Use the live widget above for exact times on any date.
Where does the sun rise and set at Merced National Wildlife Refuge?
Sunrise azimuth ranges from about 59° in June to 119° in December; sunset ranges from 301° to 241°. See the sun-path diagram for the full arc.
Can you see the Milky Way from Merced National Wildlife Refuge?
Yes — the core is visible from March to September on moonless nights. The estimated sky quality is Bortle 4 (rural / suburban transition).
Do you need a permit to photograph at Merced National Wildlife Refuge?
Personal photography from public land rarely needs a permit. Commercial shoots, models, large groups and drones may require permission from the land manager — check before you go.
How far is Merced National Wildlife Refuge from Atwater?
About 18.9 km (11.7 mi) in a straight line; driving distance is usually longer, especially in mountain terrain.

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.