Located in Whatcom County, Washington, Tomyhoi Lake is a lake at about 1,136 m (3,727 ft) above sea level. It sits roughly 34 km (21 mi) E of Peaceful Valley.
Tomyhoi Lake is a lake located in the Mount Baker Wilderness, in Whatcom County, Washington. It is between Tomyhoi Peak, Yellow Aster Butte, and Mount Larrabee, just south of the Canada–United States border. Access is via Tomyhoi Lake Trail, from FR-3065 (Twin Lakes Road), although due to avalanche debris and downed trees the last half-mile of the trail to the shores of the lake is more difficult than the rest. The lake was formed by a landslide dam. The water quality of the lake is considered very clear.From the Wikipedia article “Tomyhoi Lake”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Tomyhoi Lake the sunrise point swings a long way through the year: about 52° (NE) at the June solstice and 126° (SE) in late December. Sunset moves from 309° (NW) in June to 234° (SW) in December, and the midday sun climbs to 64° in summer but only 18° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:10 AM | 89° E | 7:20 PM | 271° W | 41° | 12h 09m |
| June solstice (Jun 21) | 5:03 AM | 52° NE | 9:15 PM | 309° NW | 64° | 16h 12m |
| September equinox (Sep 22) | 6:54 AM | 89° E | 7:06 PM | 271° W | 41° | 12h 12m |
| December solstice (Dec 21) | 7:59 AM | 126° SE | 4:12 PM | 234° SW | 18° | 8h 14m |
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
Lakes reflect best in calm air — usually the first hour after sunrise, before breezes ripple the surface.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 7:20 AM | 7:56 AM | 8:48 AM | 3:45 PM | 4:38 PM | 5:14 PM | 8h 42m |
| February | 6:43 AM | 7:16 AM | 8:01 AM | 4:42 PM | 5:28 PM | 6:00 PM | 10h 12m |
| March | 6:49 AM | 7:21 AM | 8:03 AM | 6:30 PM | 7:12 PM | 7:44 PM | 11h 51m |
| April | 5:43 AM | 6:16 AM | 6:59 AM | 7:16 PM | 7:59 PM | 8:32 PM | 13h 42m |
| May | 4:47 AM | 5:25 AM | 6:12 AM | 7:56 PM | 8:43 PM | 9:21 PM | 15h 17m |
| June | 4:20 AM | 5:03 AM | 5:53 AM | 8:23 PM | 9:13 PM | 9:56 PM | 16h 10m |
| July | 4:39 AM | 5:19 AM | 6:08 AM | 8:19 PM | 9:07 PM | 9:48 PM | 15h 48m |
| August | 5:25 AM | 6:00 AM | 6:44 AM | 7:40 PM | 8:24 PM | 8:59 PM | 14h 24m |
| September | 6:12 AM | 6:44 AM | 7:26 AM | 6:40 PM | 7:22 PM | 7:53 PM | 12h 37m |
| October | 6:56 AM | 7:28 AM | 8:11 AM | 5:35 PM | 6:18 PM | 6:50 PM | 10h 51m |
| November | 6:42 AM | 7:17 AM | 8:07 AM | 3:38 PM | 4:27 PM | 5:02 PM | 9h 10m |
| December | 7:18 AM | 7:55 AM | 8:50 AM | 3:15 PM | 4:11 PM | 4:48 PM | 8h 16m |
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 Tomyhoi Lake, the Milky Way core is visible in a dark sky from May through July. June gives the longest window (about 2.5 hours on a moonless night), and the core peaks around 12° 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 | — | -6° | — |
| February | Below 10° in darkness | — | 4° | — |
| March | Below 10° in darkness | — | 8° | — |
| April | 3:58 AM – 4:08 AM | 0.2 | 11° | SSE → SSE |
| May | 2:07 AM – 2:47 AM | 0.7 | 12° | SSE → S |
| June | 11:57 PM – 2:27 AM | 2.5 | 12° | SSE → SSW |
| July | 12:08 AM – 12:38 AM | 0.5 | 11° | S → SSW |
| August | 10:35 PM – 10:35 PM | 0.0 | 10° | SSW → SSW |
| September | Below 10° in darkness | — | 8° | — |
| October | Below 10° in darkness | — | 4° | — |
| November | Below 10° in darkness | — | -5° | — |
| 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: 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 ≈ 21.75 mag/arcsec². Aurora needs roughly Kp 4.0+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show July as the clearest month (about 42% average cloud cover) and November as the cloudiest (76%). August 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 | 47 | 50 | 56 | 68 | 77 | 87 | 90 | 90 | 86 | 76 | 55 | 41 |
| Low °F | -20 | -17 | -12 | 1 | 16 | 28 | 34 | 35 | 24 | -2 | -17 | -20 |
| Precip. (in) | 9.5 | 6.5 | 7.5 | 4.8 | 3.6 | 3.0 | 1.3 | 1.7 | 3.4 | 7.2 | 10.7 | 9.1 |
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 lake
- Mist often lifts off lakes on cold mornings after warm days, especially in autumn.
- Include shoreline rocks, reeds or a log as foreground to give the reflection depth.
- Expose for the brighter sky; reflections are typically half a stop to a stop darker.
- After sunset, long exposures smooth wind ripples into glass.
- Scout in daylight if you plan to shoot at night or before sunrise.
Season: Autumn mornings bring mist and fall color; high-elevation lakes are usually ice-free only from early summer to mid-autumn.
Suggested gear: Tripod, Circular polarizer, Wide-angle lens, Waterproof boots. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Tomyhoi Lake, closest first.
Mountain Peak
Fire Lookout
Lake
Scenic Viewpoint
WaterfallScenic Viewpoint
Waterfall
Lake
WaterfallCampgrounds nearby (Recreation.gov)
- Silver Fir Campground8.0 km (5.0 mi) · reservable
- Excelsior Group Camp12.6 km (7.8 mi) · reservable
- Douglas Fir Campground18.7 km (11.6 mi) · reservable
- Park Creek Campground27 km (17 mi) · reservable
- Shannon Creek Campground27 km (17 mi) · reservable
FAQ
When is the best time to photograph Tomyhoi Lake?
What time is golden hour at Tomyhoi Lake?
Where does the sun rise and set at Tomyhoi Lake?
Can you see the Milky Way from Tomyhoi Lake?
Do you need a permit to photograph at Tomyhoi Lake?
How far is Tomyhoi Lake from Peaceful Valley?
Sources
Location data: Wikidata, USGS GNIS / GeoNames, 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.