List of prehistoric sites in Colorado

This list of prehistoric sites in the U.S. State of Colorado includes historical and archaeological sites of humans from their earliest times in Colorado to just before the Colorado historic period, which ranges from about 12,000 BC to AD 19th century. The Period is defined by the culture enjoyed at the time, from the earliest hunter-gatherers, the Paleo-Indians, through to the prehistoric parents to the modern Native Americans.

Source: Wikipedia — List of prehistoric sites in Colorado (CC BY-SA 4.0)