Mile 290 North Dakota - South Dakota boundary monument
historic site
- Built
- 1891
- Material
- quartzite
| Date | Sunrise | Golden hour | Sunset |
|---|---|---|---|
| March equinox | 06:54 | 18:24 | 19:03 |
| June solstice | 05:01 | 19:59 | 20:45 |
| September equinox | 06:38 | 18:10 | 18:50 |
| December solstice | 07:30 | 15:18 | 16:09 |
Local time (America/Denver).
45.94507, -102.58021
Elevation 848 m (modelled from terrain)