David Thompson Historical Monument
historic site
- Built
- 1925-07-17
- Elevation
- 465 m
- Material
- granite
- Inscription
- David Thompson 1770-1857 Geographer and Astronomer Passed near here in 1797 and 1798 on a scientific and trading expedition. He made the first map of the country which is now north Dakota and achieved many noteworthy discoveries in the northwest.
| Date | Sunrise | Golden hour | Sunset |
|---|---|---|---|
| March equinox | 07:47 | 19:15 | 19:56 |
| June solstice | 05:44 | 20:58 | 21:47 |
| September equinox | 07:30 | 19:02 | 19:43 |
| December solstice | 08:31 | 15:58 | 16:52 |
Local time (America/Chicago).
48.12239, -100.75011
Elevation 465 m