Grattan Massacre Historical Monument
historic site
1854 opening engagement of the First Sioux War
Wikidata Q1543656, matched on coordinates and name (10 m apart).
- Elevation
- 1275 m
- 1.8 mi off the Oregon Trail Historic Byway
- 20.2 mi off the Western Trails Scenic and Historic Byway
| Date | Sunrise | Golden hour | Sunset |
|---|---|---|---|
| March equinox | 07:02 | 18:33 | 19:10 |
| June solstice | 05:22 | 19:55 | 20:38 |
| September equinox | 06:46 | 18:20 | 18:57 |
| December solstice | 07:24 | 15:44 | 16:29 |
Local time (America/Denver).
42.13232, -104.40568
Elevation 1,275 m