- Colorado was originally defined only by latitude and longitude, but is now delineated as a polygon with 697 sides.
- Mount Evans was named for the territorial governor complicit in the Sand Creek Massacre.
- Mount Silverheels was named for a beloved prostitute.
- San Miguel was designated the original Costilla County seat, but was later found to be in New Mexico.
- In 1865, the white male voters of the Territory of Colorado denied the vote to Indians, Negros, Asians, and women.
- Twenty-eight years later, the male voters of the State of Colorado granted women the vote, only the second state to do so.