Located in King County, Washington, Bitter Lake is a lake at about 134 m (440 ft) above sea level. It sits roughly 3.3 km (2.1 mi) SSW of Shoreline.
Bitter Lake (Lushootseed: č̓alq̓ʷadiʔ) is a small lake in northwest Seattle, Washington, USA. The lake covers 19 acres (77,000 m2), with a mean depth of 16 feet (4.9 m) and a maximum depth of 31 feet (9.4 m). Until 1913, a sawmill was located at its southwest corner. Tannic acid from logs dumped into the lake gave its water a bitter taste and the lake itself a name in English. In Lushootseed, the lake is called č̓alq̓ʷadiʔ, meaning "blackcaps on the sides," as it was a place where people historically came to collect these plants. It was also a refuge site for the Shilshole people when they experienced slave raids coming from the far north, in what is now Alaska and northern British Columbia. It is a glacial lake with its basin having been dug 15,000 years ago by the Puget Lobe of the Cordilleran ice sheet, which also created Lake Washington, Union, Green, and Haller Lakes. The...From the Wikipedia article “Bitter Lake (Seattle)”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Bitter Lake 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 308° (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) | 7:13 AM | 89° E | 7:22 PM | 271° W | 42° | 12h 09m |
| June solstice (Jun 21) | 5:12 AM | 53° NE | 9:12 PM | 308° NW | 66° | 16h 00m |
| September equinox (Sep 22) | 6:57 AM | 89° E | 7:09 PM | 271° W | 43° | 12h 12m |
| December solstice (Dec 21) | 7:56 AM | 125° SE | 4:20 PM | 235° SW | 19° | 8h 24m |
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 | 7:19 AM | 7:54 AM | 8:44 AM | 3:55 PM | 4:45 PM | 5:20 PM | 8h 51m |
| February | 6:44 AM | 7:16 AM | 8:00 AM | 4:49 PM | 5:33 PM | 6:05 PM | 10h 16m |
| March | 6:53 AM | 7:23 AM | 8:04 AM | 6:34 PM | 7:15 PM | 7:46 PM | 11h 52m |
| April | 5:48 AM | 6:21 AM | 7:02 AM | 7:18 PM | 7:59 PM | 8:32 PM | 13h 38m |
| May | 4:56 AM | 5:32 AM | 6:18 AM | 7:56 PM | 8:41 PM | 9:18 PM | 15h 08m |
| June | 4:31 AM | 5:11 AM | 6:00 AM | 8:22 PM | 9:10 PM | 9:51 PM | 15h 59m |
| July | 4:48 AM | 5:27 AM | 6:14 AM | 8:18 PM | 9:05 PM | 9:44 PM | 15h 37m |
| August | 5:32 AM | 6:06 AM | 6:49 AM | 7:41 PM | 8:24 PM | 8:58 PM | 14h 18m |
| September | 6:16 AM | 6:48 AM | 7:28 AM | 6:43 PM | 7:24 PM | 7:55 PM | 12h 36m |
| October | 6:58 AM | 7:29 AM | 8:11 AM | 5:40 PM | 6:23 PM | 6:54 PM | 10h 54m |
| November | 6:42 AM | 7:16 AM | 8:04 AM | 3:46 PM | 4:34 PM | 5:08 PM | 9h 18m |
| December | 7:16 AM | 7:52 AM | 8:45 AM | 3:26 PM | 4:19 PM | 4:55 PM | 8h 26m |
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 Bitter Lake, the Milky Way core is visible in a dark sky from April through August. June gives the longest window (about 1.7 hours on a moonless night), and the core peaks around 13° above the southern horizon. Our light-pollution model puts the sky at about Bortle 8 (city 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 | — | -6° | — |
| February | Below 10° in darkness | — | 5° | — |
| March | Below 10° in darkness | — | 9° | — |
| April | 3:44 AM – 4:14 AM | 0.5 | 12° | SSE → SSE |
| May | 1:45 AM – 3:05 AM | 1.3 | 13° | SSE → S |
| June | 12:19 AM – 1:59 AM | 1.7 | 13° | SSE → S |
| July | 11:48 PM – 12:58 AM | 1.2 | 13° | S → SSW |
| August | 10:28 PM – 10:58 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: 8 Bortle 8 — City sky. Only bright constellations are visible; the sky glows orange or white. Modeled zenith brightness ≈ 18.34 mag/arcsec². Aurora needs roughly Kp 4.5+ 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 46% average cloud cover) and January as the cloudiest (80%). 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 | 64 | 63 | 71 | 87 | 90 | 93 | 100 | 91 | 91 | 79 | 71 | 60 |
| Low °F | 13 | 15 | 25 | 29 | 31 | 40 | 46 | 46 | 39 | 28 | 16 | 13 |
| Precip. (in) | 6.7 | 4.5 | 5.4 | 3.8 | 2.8 | 2.0 | 0.7 | 1.1 | 2.3 | 4.8 | 7.5 | 6.8 |
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 lake
- Expose for the brighter sky; reflections are typically half a stop to a stop darker.
- After sunset, long exposures smooth wind ripples into glass.
- For mirror reflections, get low and close to the water; the reflection grows with a lower camera.
- A polarizer can remove reflections to show the lakebed — or keep them, depending on rotation.
- Shoot RAW to keep the most latitude for high-contrast sunrise and sunset scenes.
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 Bitter Lake, closest first.
Lake
Lake
Beach
Beach
Lake
State Park
Botanical Garden
Lighthouse
LakeFAQ
When is the best time to photograph Bitter Lake?
What time is golden hour at Bitter Lake?
Where does the sun rise and set at Bitter Lake?
Can you see the Milky Way from Bitter Lake?
Do you need a permit to photograph at Bitter Lake?
How far is Bitter Lake from Shoreline?
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.