Located in Clear Creek County, Colorado, Argentine Pass is a mountain pass at about 4,025 m (13,205 ft) above sea level. The nearest town is Georgetown, about 11.6 km (7.2 mi) away (Argentine Pass lies SW of town).
Argentine Pass, elevation 13,207 ft (4,025 m), is a high mountain pass that crosses the Continental Divide in the Front Range of the Rocky Mountains of central Colorado in the United States. Argentine Pass is located on the crest of the Front Range along the boundary southwest of Georgetown and is the highest named vehicle-accessible pass in the state. Some early references use other names for the pass. An 1867 description of the trip from Georgetown into the valley of the Snake River refers to it as Sanderson Pass. A lithograph caption from 1869 calls it the Snake River Pass.From the Wikipedia article “Argentine Pass”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Argentine Pass the sunrise point swings a long way through the year: about 58° (ENE) at the June solstice and 120° (ESE) in late December. Sunset moves from 302° (WNW) in June to 240° (WSW) in December, and the midday sun climbs to 74° in summer but only 27° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:07 AM | 90° E | 7:15 PM | 271° W | 50° | 12h 08m |
| June solstice (Jun 21) | 5:36 AM | 58° ENE | 8:35 PM | 302° WNW | 74° | 14h 58m |
| September equinox (Sep 22) | 6:51 AM | 89° E | 7:02 PM | 271° W | 51° | 12h 10m |
| December solstice (Dec 21) | 7:21 AM | 120° ESE | 4:43 PM | 240° WSW | 27° | 9h 22m |
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
Mountain passes sit above valleys, so they reward sunrise and sunset with layered ridges, valley fog and long shadows.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:53 AM | 7:23 AM | 8:04 AM | 4:22 PM | 5:03 PM | 5:33 PM | 9h 41m |
| February | 6:29 AM | 6:56 AM | 7:34 AM | 5:02 PM | 5:40 PM | 6:08 PM | 10h 43m |
| March | 6:49 AM | 7:15 AM | 7:51 AM | 6:35 PM | 7:10 PM | 7:37 PM | 11h 55m |
| April | 5:58 AM | 6:26 AM | 7:02 AM | 7:05 PM | 7:41 PM | 8:09 PM | 13h 15m |
| May | 5:19 AM | 5:50 AM | 6:28 AM | 7:33 PM | 8:11 PM | 8:41 PM | 14h 21m |
| June | 5:03 AM | 5:36 AM | 6:16 AM | 7:53 PM | 8:33 PM | 9:06 PM | 14h 57m |
| July | 5:17 AM | 5:49 AM | 6:28 AM | 7:51 PM | 8:31 PM | 9:02 PM | 14h 42m |
| August | 5:47 AM | 6:16 AM | 6:53 AM | 7:24 PM | 8:01 PM | 8:30 PM | 13h 45m |
| September | 6:18 AM | 6:45 AM | 7:21 AM | 6:38 PM | 7:13 PM | 7:40 PM | 12h 28m |
| October | 6:47 AM | 7:14 AM | 7:50 AM | 5:49 PM | 6:25 PM | 6:52 PM | 11h 11m |
| November | 6:19 AM | 6:48 AM | 7:28 AM | 4:09 PM | 4:49 PM | 5:18 PM | 10h 01m |
| December | 6:47 AM | 7:18 AM | 8:00 AM | 3:58 PM | 4:41 PM | 5:11 PM | 9h 23m |
Local time (America/Denver), 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 Argentine Pass, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 4.8 hours on a moonless night), and the core peaks around 21° above the southern horizon. Our light-pollution model puts the sky at about Bortle 3 (rural sky), good enough for detailed Milky Way images.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -3° | — |
| February | 5:10 AM – 5:20 AM | 0.2 | 11° | SE → SE |
| March | 4:20 AM – 5:40 AM | 1.3 | 18° | SE → SSE |
| April | 2:18 AM – 4:48 AM | 2.5 | 21° | SE → S |
| May | 12:21 AM – 3:51 AM | 3.5 | 21° | SE → S |
| June | 10:35 PM – 3:25 AM | 4.8 | 21° | SE → SSW |
| July | 10:27 PM – 2:07 AM | 3.7 | 21° | S → SW |
| August | 9:42 PM – 12:02 AM | 2.3 | 21° | S → SW |
| September | 8:45 PM – 10:05 PM | 1.3 | 18° | SSW → SW |
| October | 7:55 PM – 8:05 PM | 0.2 | 12° | SW → SW |
| November | Below 10° in darkness | — | 0° | — |
| 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: 3 Bortle 3 — Rural sky. Some light domes sit on the horizon, but the Milky Way still looks complex overhead. Modeled zenith brightness ≈ 21.29 mag/arcsec². Aurora needs roughly Kp 7.5+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show September as the clearest month (about 44% average cloud cover) and April as the cloudiest (64%). July 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 | 46 | 47 | 64 | 68 | 81 | 86 | 87 | 85 | 82 | 73 | 62 | 49 |
| Low °F | -21 | -30 | -20 | -8 | 4 | 23 | 34 | 31 | 16 | -6 | -14 | -21 |
| Precip. (in) | 1.2 | 1.6 | 1.8 | 2.4 | 2.3 | 1.4 | 2.4 | 2.0 | 1.6 | 1.4 | 1.2 | 1.3 |
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 mountain pass
- Weather changes fast at elevation; carry layers even in summer.
- Summit pull-outs often face one direction; use the sun azimuth table to see whether sunrise or sunset suits the view.
- Wildflowers bloom late at pass elevations — often July to early August in the Rockies and Sierra.
- Check road status before driving: many high passes close seasonally or after storms.
- Check road and trail conditions with the managing agency before you go.
Season: Summer and early autumn are the main season; winter visits depend on plowing and avalanche conditions.
Suggested gear: Telephoto lens, Tripod, Warm layers, Road-condition app. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Argentine Pass, closest first.
Mountain Peak
Mountain Peak
Mountain Peak
Mountain Pass
Ghost Town
Waterfall
Mountain Peak
Mountain Pass
Ghost TownCampgrounds nearby (Recreation.gov)
- Guanella Pass5.9 km (3.7 mi) · reservable
- Geneva Park Campground11.9 km (7.4 mi) · reservable
- West Chicago Creek12.3 km (7.6 mi) · reservable
- Burning Bear Campground13.9 km (8.6 mi) · reservable
- Hall Valley15.9 km (9.9 mi) · reservable
FAQ
When is the best time to photograph Argentine Pass?
What time is golden hour at Argentine Pass?
Where does the sun rise and set at Argentine Pass?
Can you see the Milky Way from Argentine Pass?
Do you need a permit to photograph at Argentine Pass?
How far is Argentine Pass from Georgetown?
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.