Located in Keweenaw County, Michigan, Mary Macdonald Preserve Dune and Swale Complex (Major) is a sand dunes at about 243 m (797 ft) above sea level. It sits roughly 49 km (30 mi) ENE of Laurium.
Sunrise & sunset directions
At Mary Macdonald Preserve Dune and Swale Complex (Major) the sunrise point swings a long way through the year: about 53° (NE) at the June solstice and 125° (SE) in late December. Sunset moves from 307° (NW) in June to 235° (SW) in December, and the midday sun climbs to 66° in summer but only 19° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:55 AM | 89° E | 8:04 PM | 271° W | 42° | 12h 09m |
| June solstice (Jun 21) | 5:55 AM | 53° NE | 9:53 PM | 307° NW | 66° | 15h 58m |
| September equinox (Sep 22) | 7:39 AM | 89° E | 7:51 PM | 271° W | 43° | 12h 12m |
| December solstice (Dec 21) | 8:37 AM | 125° SE | 5:04 PM | 235° SW | 19° | 8h 27m |
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 | 8:00 AM | 8:35 AM | 9:25 AM | 4:38 PM | 5:28 PM | 6:02 PM | 8h 53m |
| February | 7:26 AM | 7:58 AM | 8:41 AM | 5:32 PM | 6:15 PM | 6:47 PM | 10h 17m |
| March | 7:35 AM | 8:05 AM | 8:46 AM | 7:16 PM | 7:57 PM | 8:28 PM | 11h 52m |
| April | 6:31 AM | 7:04 AM | 7:45 AM | 7:59 PM | 8:41 PM | 9:13 PM | 13h 37m |
| May | 5:39 AM | 6:16 AM | 7:00 AM | 8:37 PM | 9:22 PM | 9:58 PM | 15h 06m |
| June | 5:14 AM | 5:55 AM | 6:43 AM | 9:03 PM | 9:51 PM | 10:31 PM | 15h 56m |
| July | 5:32 AM | 6:10 AM | 6:57 AM | 8:59 PM | 9:46 PM | 10:24 PM | 15h 35m |
| August | 6:15 AM | 6:48 AM | 7:31 AM | 8:23 PM | 9:05 PM | 9:39 PM | 14h 17m |
| September | 6:59 AM | 7:30 AM | 8:10 AM | 7:25 PM | 8:06 PM | 8:36 PM | 12h 36m |
| October | 7:40 AM | 8:10 AM | 8:52 AM | 6:23 PM | 7:05 PM | 7:36 PM | 10h 55m |
| November | 7:23 AM | 7:57 AM | 8:44 AM | 4:30 PM | 5:17 PM | 5:50 PM | 9h 20m |
| December | 7:57 AM | 8:33 AM | 9:26 AM | 4:09 PM | 5:02 PM | 5:38 PM | 8h 29m |
Local time (America/Detroit), 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 Mary Macdonald Preserve Dune and Swale Complex (Major), the Milky Way core is visible in a dark sky from April through August. June gives the longest window (about 1.8 hours on a moonless night), and the core peaks around 14° above the southern horizon. Our light-pollution model puts the sky at about Bortle 1 (excellent dark-sky site), which is excellent for astrophotography.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -6° | — |
| February | Below 10° in darkness | — | 5° | — |
| March | 6:20 AM – 6:20 AM | 0.0 | 10° | SSE → SSE |
| April | 4:25 AM – 5:05 AM | 0.7 | 13° | SSE → SSE |
| May | 2:24 AM – 3:44 AM | 1.3 | 13° | SSE → S |
| June | 12:55 AM – 2:45 AM | 1.8 | 14° | SSE → S |
| July | 12:26 AM – 1:46 AM | 1.3 | 13° | S → SSW |
| August | 11:09 PM – 11:39 PM | 0.5 | 12° | SSW → SSW |
| September | Below 10° in darkness | — | 9° | — |
| October | Below 10° in darkness | — | 5° | — |
| November | Below 10° in darkness | — | -4° | — |
| December | Below 10° in darkness | — | -20° | — |
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: 1 Bortle 1 — Excellent dark-sky site. The Milky Way casts faint shadows; zodiacal light and airglow are obvious. Modeled zenith brightness ≈ 21.94 mag/arcsec². Aurora needs roughly Kp 3.0+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show March as the clearest month (about 77% average cloud cover) and December as the cloudiest (87%). August is the warmest month and February 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 | 40 | 41 | 53 | 52 | 58 | 64 | 80 | 73 | 73 | 65 | 55 | 49 |
| Low °F | -2 | -8 | -2 | 15 | 27 | 35 | 39 | 47 | 41 | 31 | 13 | 8 |
| Precip. (in) | 2.3 | 2.0 | 1.7 | 2.9 | 3.0 | 3.1 | 2.6 | 2.5 | 3.2 | 3.6 | 2.5 | 2.8 |
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.
Nearby photo spots
Other locations within 25 km of Mary Macdonald Preserve Dune and Swale Complex (Major), closest first.
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LakeFAQ
When is the best time to photograph Mary Macdonald Preserve Dune and Swale Complex (Major)?
What time is golden hour at Mary Macdonald Preserve Dune and Swale Complex (Major)?
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Can you see the Milky Way from Mary Macdonald Preserve Dune and Swale Complex (Major)?
Do you need a permit to photograph at Mary Macdonald Preserve Dune and Swale Complex (Major)?
How far is Mary Macdonald Preserve Dune and Swale Complex (Major) from Laurium?
Sources
Location data: USGS GNIS / GeoNames. 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.