An old school in Nathrop.
|Named for||Charles Nachtrieb|
|Elevation||7,680 ft (2,341 m)|
|Time zone||UTC-7 (MST)|
|• Summer (DST)||UTC-6 (MDT)|
|GNIS feature ID||0204759|
Nathrop is located at(38.747222,-106.075556).
Ruby Mountain is a rhyolite outcrop located about one mile northeast of Nathrop. Small spessartite garnet crystals are found throughout the outcropping. Small pebbles of black obsidian referred to as "Apache tears" by collectors can also be found in the talus rock at the base of the cliffs.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- Dawson, John Frank. Place names in Colorado: why 700 communities were so named, 150 of Spanish or Indian origin. Denver, CO: The J. Frank Dawson Publishing Co. p. 36.