Located in City and County of San Francisco, California, Bone Beds and Sand Dunes is a sand dunes. It lies in or next to Golden Gate National Recreation Area, so park hours, fees and rules apply. The nearest town is Parkside, about 4.4 km (2.7 mi) away (Bone Beds and Sand Dunes lies NNW of town).
From the National Park Service
These modest sand dunes are a remnant of a vast dune field that underlies much of San Francisco. Sand from Ocean Beach was blown up over the hills of San Francisco, forming dunes as far east as San Francisco's Financial District and the bay. The sand originated on a broad coastal plain that stretched 30 miles west, when the sea level was low during the last Ice Age. The Colma Formation As continental glaciers melted between about 18,000 and 5,000 years ago, sea level rose rapidly, and the coastal sand was transported inland. The underlying reddish Colma Formation, exposed in the bluffs below, was deposited during that Ice Age. Mastadons by the Bay? In 1886, near here, workers were digging a well for Adolph Sutro and found mastodon bones embedded in a clay bank of the Colma. As was typical of Sutro's interest in natural history, he put these relics on display at Sutro Heights.
Text: National Park Service (public domain) — nps.gov.
Sunrise & sunset directions
At Bone Beds and Sand Dunes 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 241° (WSW) in December, and the midday sun climbs to 76° in summer but only 29° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:14 AM | 90° E | 7:22 PM | 271° W | 52° | 12h 08m |
| June solstice (Jun 21) | 5:49 AM | 59° ENE | 8:36 PM | 301° WNW | 76° | 14h 47m |
| September equinox (Sep 22) | 6:59 AM | 89° E | 7:09 PM | 271° W | 52° | 12h 10m |
| December solstice (Dec 21) | 7:23 AM | 120° ESE | 4:55 PM | 241° WSW | 29° | 9h 33m |
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
Dunes need low sun: ripples and ridgelines only appear when side-light casts shadows, so shoot within an hour of sunrise or sunset.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:56 AM | 7:25 AM | 8:05 AM | 4:36 PM | 5:15 PM | 5:44 PM | 9h 50m |
| February | 6:34 AM | 7:01 AM | 7:37 AM | 5:13 PM | 5:50 PM | 6:16 PM | 10h 49m |
| March | 6:56 AM | 7:22 AM | 7:57 AM | 6:43 PM | 7:18 PM | 7:44 PM | 11h 56m |
| April | 6:08 AM | 6:35 AM | 7:11 AM | 7:11 PM | 7:46 PM | 8:13 PM | 13h 10m |
| May | 5:32 AM | 6:01 AM | 6:38 AM | 7:36 PM | 8:14 PM | 8:43 PM | 14h 12m |
| June | 5:17 AM | 5:48 AM | 6:28 AM | 7:55 PM | 8:34 PM | 9:06 PM | 14h 46m |
| July | 5:30 AM | 6:01 AM | 6:39 AM | 7:54 PM | 8:32 PM | 9:03 PM | 14h 32m |
| August | 5:58 AM | 6:26 AM | 7:02 AM | 7:28 PM | 8:04 PM | 8:32 PM | 13h 38m |
| September | 6:26 AM | 6:53 AM | 7:27 AM | 6:45 PM | 7:20 PM | 7:46 PM | 12h 27m |
| October | 6:53 AM | 7:19 AM | 7:55 AM | 5:58 PM | 6:34 PM | 7:00 PM | 11h 15m |
| November | 6:23 AM | 6:51 AM | 7:30 AM | 4:21 PM | 5:00 PM | 5:28 PM | 10h 09m |
| December | 6:50 AM | 7:19 AM | 8:00 AM | 4:12 PM | 4:53 PM | 5:22 PM | 9h 34m |
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 Bone Beds and Sand Dunes, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 5.3 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 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 | 5:08 AM – 5:28 AM | 0.3 | 13° | SE → SE |
| March | 4:15 AM – 5:45 AM | 1.5 | 20° | SE → SSE |
| April | 2:19 AM – 4:59 AM | 2.7 | 23° | SE → S |
| May | 12:18 AM – 4:08 AM | 3.8 | 23° | SE → S |
| June | 10:29 PM – 3:49 AM | 5.3 | 23° | SE → SW |
| July | 10:22 PM – 2:22 AM | 4.0 | 23° | SSE → SW |
| August | 9:42 PM – 12:22 AM | 2.7 | 23° | S → SW |
| September | 8:48 PM – 10:18 PM | 1.5 | 20° | SSW → SW |
| October | 8:01 PM – 8:21 PM | 0.3 | 13° | 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: 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 ≈ 18.42 mag/arcsec².
Weather & best season
Long-term NASA satellite data for this area show October as the clearest month (about 44% average cloud cover) and December as the cloudiest (59%). September 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 | 67 | 69 | 76 | 80 | 87 | 88 | 78 | 85 | 94 | 84 | 78 | 65 |
| Low °F | 36 | 40 | 41 | 43 | 45 | 48 | 51 | 53 | 51 | 47 | 39 | 36 |
| Precip. (in) | 3.4 | 3.7 | 2.9 | 1.6 | 0.6 | 0.2 | 0.1 | 0.1 | 0.1 | 1.0 | 2.2 | 4.4 |
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 sand dunes
- Walk along ridges rather than across faces to avoid leaving footprints in your future compositions.
- A telephoto isolates S-curves and layered ridges.
- Wind erases tracks overnight — mornings have the cleanest sand.
- Protect gear from blowing sand; avoid changing lenses in the wind.
- Scout in daylight if you plan to shoot at night or before sunrise.
Season: Spring and autumn for comfortable temperatures; full moon nights give soft light on the sand.
Suggested gear: Telephoto lens, Lens blower, Sun protection, Water. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Permits, drones & access
National Park Service rules. Under federal law (54 U.S.C. 100905), still photography in National Park Service areas needs a permit only when it (1) takes place where members of the public are not allowed, (2) uses models, sets or props that are not part of the location's natural or cultural resources or administrative facilities, or (3) would cause the park to incur additional administrative costs to monitor the activity. Ordinary visitor and most landscape photography needs no permit. Commercial filming rules are separate and have changed in recent years — confirm current requirements with the park before a paid shoot.
Drones: Launching, landing or operating unmanned aircraft (drones) is prohibited in National Park Service units under a 2014 Superintendent's closure (36 CFR 1.5), except where a park has issued specific written approval. Flying from outside the boundary over park land can also violate park rules and disturb wildlife.
Nearby photo spots
Other locations within 25 km of Bone Beds and Sand Dunes, closest first.
Scenic Viewpoint
Beach
Lake
Lighthouse
BeachBeach
Beach
Lake
LakeCampgrounds nearby (Recreation.gov)
- Rob Hill Group Campground3.8 km (2.4 mi) · reservable
- Bicentennial Campground6.2 km (3.9 mi) · reservable
- Kirby Cove Campground7.4 km (4.6 mi) · reservable
- Aquatic Park Cove, Black Point Overnight Anchoring, Sailing Vessels Only (Auxiliary Engine Ok)8.4 km (5.2 mi) · reservable
- Hawk Campground8.7 km (5.4 mi) · reservable
FAQ
When is the best time to photograph Bone Beds and Sand Dunes?
What time is golden hour at Bone Beds and Sand Dunes?
Where does the sun rise and set at Bone Beds and Sand Dunes?
Can you see the Milky Way from Bone Beds and Sand Dunes?
Do you need a permit to photograph at Bone Beds and Sand Dunes?
How far is Bone Beds and Sand Dunes from Parkside?
Sources
Location data: National Park Service. 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.