Located in Chugach Census Area, Alaska, Thompson Pass Viewpoint is a scenic viewpoint. It sits roughly 33 km (21 mi) E of Valdez.
Sunrise & sunset directions
At Thompson Pass Viewpoint the sunrise point swings a long way through the year: about 32° (NNE) at the June solstice and 143° (SE) in late December. Sunset moves from 328° (NNW) in June to 217° (SW) in December, and the midday sun climbs to 52° in summer but only 5° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:45 AM | 89° E | 7:58 PM | 272° W | 29° | 12h 13m |
| June solstice (Jun 21) | 4:05 AM | 32° NNE | 11:26 PM | 328° NNW | 52° | 19h 20m |
| September equinox (Sep 22) | 7:28 AM | 88° E | 7:45 PM | 272° W | 29° | 12h 17m |
| December solstice (Dec 21) | 9:57 AM | 143° SE | 3:26 PM | 217° SW | 5° | 5h 29m |
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
Overlooks are about the sweep of the land, so low-angle light matters most: side-light at sunrise or sunset reveals ridges and texture that midday sun flattens.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 8:44 AM | 9:40 AM | 11:27 AM | 2:19 PM | 4:06 PM | 5:02 PM | 6h 26m |
| February | 7:40 AM | 8:26 AM | 9:33 AM | 4:23 PM | 5:30 PM | 6:16 PM | 9h 04m |
| March | 7:18 AM | 8:01 AM | 8:58 AM | 6:47 PM | 7:45 PM | 8:28 PM | 11h 44m |
| April | 5:34 AM | 6:23 AM | 7:22 AM | 8:05 PM | 9:04 PM | 9:53 PM | 14h 42m |
| May | 3:47 AM | 4:57 AM | 6:08 AM | 9:13 PM | 10:23 PM | 11:33 PM | 17h 27m |
| June | — | 4:06 AM | 5:32 AM | 9:57 PM | 11:22 PM | — | 19h 16m |
| July | 3:05 AM | 4:36 AM | 5:54 AM | 9:45 PM | 11:03 PM | 12:34 AM | 18h 26m |
| August | 4:59 AM | 5:53 AM | 6:56 AM | 8:41 PM | 9:44 PM | 10:38 PM | 15h 51m |
| September | 6:27 AM | 7:11 AM | 8:07 AM | 7:11 PM | 8:07 PM | 8:51 PM | 12h 57m |
| October | 7:42 AM | 8:26 AM | 9:28 AM | 5:31 PM | 6:33 PM | 7:17 PM | 10h 07m |
| November | 7:58 AM | 8:49 AM | 10:16 AM | 2:41 PM | 4:08 PM | 4:59 PM | 7h 18m |
| December | 8:51 AM | 9:53 AM | — | — | 3:25 PM | 4:27 PM | 5h 33m |
Local time (America/Anchorage), 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
The Milky Way's bright core (in Sagittarius) barely clears the southern horizon at this latitude, so focus on winter Milky Way, aurora or star trails instead.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -12° | — |
| February | Below 10° in darkness | — | -6° | — |
| March | Below 10° in darkness | — | -5° | — |
| April | Below 10° in darkness | — | -9° | — |
| May | No darkness | — | — | — |
| June | No darkness | — | — | — |
| July | No darkness | — | — | — |
| August | Below 10° in darkness | — | -4° | — |
| September | Below 10° in darkness | — | -7° | — |
| October | Below 10° in darkness | — | -8° | — |
| November | Below 10° in darkness | — | -12° | — |
| December | Below 10° in darkness | — | -22° | — |
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 0.0+ 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 58% average cloud cover) and October as the cloudiest (79%). August 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 | 34 | 32 | 41 | 49 | 56 | 62 | 68 | 72 | 57 | 48 | 34 | 33 |
| Low °F | -37 | -36 | -35 | -14 | 10 | 19 | 29 | 23 | 10 | -10 | -32 | -29 |
| Precip. (in) | 6.7 | 6.1 | 4.5 | 4.3 | 4.8 | 4.9 | 6.5 | 8.4 | 10.4 | 8.7 | 7.4 | 7.8 |
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 scenic viewpoint
- Blue hour after sunset is excellent for towns or roads below the viewpoint as lights come on.
- Arrive 30–45 minutes before sunrise or sunset to find a composition before the light peaks.
- Use a telephoto (70–200 mm) to isolate layered ridges and light rays instead of shooting only wide.
- Check the sun azimuth for your date: front-light, side-light and back-light give three different pictures from the same rail.
- Haze builds in summer afternoons; mornings after a cold front are often the clearest.
- Bring a spare battery — cold weather and long exposures drain them fast.
Season: Clear, dry air in autumn and after winter storms gives the longest views; summer adds wildflowers but also haze.
Suggested gear: Tripod, Telephoto lens, Graduated ND filter, Headlamp. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Thompson Pass Viewpoint, closest first.
Mountain Pass
Glacier
Scenic Viewpoint
WaterfallWaterfallWaterfallWaterfallScenic ViewpointScenic ViewpointFAQ
When is the best time to photograph Thompson Pass Viewpoint?
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How far is Thompson Pass Viewpoint from Valdez?
Sources
Location data: OpenStreetMap contributors. 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.