Sa Pa, Lào Cai, Vietnam · VMM 100 Miles 2026

Where night falls

Maps use the realistic predicted pace (optimistic / realistic / conservative from a calibrated 100 K model). Faster running puts you further along the course at the same clock time; planet positions barely change across the course, terrain horizon does.

Copernicus GLO-30 is a ~30 m DSM: major landforms only, not the trail surface.

Two nights, predicted pace. Open a night when a stop or a name catches you.

Predicted finish: optimistic 32h 06m, realistic 36h 28m, conservative 41h 48m.

Night Astro dusk Astro dawn Length Optimistic km Realistic km Conservative km
1 Fri 18 Sep 19:19 Sat 19 Sep 04:37 9h 18m 67–109 60–99 53–89
2 Sat 19 Sep 19:18 Sun 20 Sep 04:37 9h 19m 157–157 152–157 136–157
Twilight (context)
Event Local time Elapsed
sunset Fri 18 Sep 18:04 10h 05m
civil dusk Fri 18 Sep 18:27 10h 27m
nautical dusk Fri 18 Sep 18:53 10h 53m
astronomical dusk Fri 18 Sep 19:19 11h 20m
astronomical dawn Sat 19 Sep 04:37 20h 37m
nautical dawn Sat 19 Sep 05:03 21h 04m
civil dawn Sat 19 Sep 05:29 21h 30m
sunrise Sat 19 Sep 05:52 21h 52m
sunset Sat 19 Sep 18:03 34h 04m
civil dusk Sat 19 Sep 18:26 34h 26m
nautical dusk Sat 19 Sep 18:52 34h 52m
astronomical dusk Sat 19 Sep 19:18 35h 19m
astronomical dawn Sun 20 Sep 04:37 44h 38m
nautical dawn Sun 20 Sep 05:04 45h 04m
civil dawn Sun 20 Sep 05:30 45h 30m
sunrise Sun 20 Sep 05:52 45h 52m
Course with stargazing stops
Elevation profile with night windows
Stargazing spot scores along the course

While the course is astronomically dark, it is sampled every 2 km. Each point is scored for an open DSM horizon, higher ground, a dim or set moon, and whether the Milky Way centre sits above the local horizon. Aid stations are not used. The listed places are the highest-scoring points, spaced along the course so closer samples are the same stretch, not extra stops.

Download stargazing locations (GPX)

Nights