The 64 counties of the U.S. State of 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.
There were more than 56,500 recorded prehistoric sites in Colorado by 1996.Cassells, E. Steve. (1997) The Archaeology of Colorado. Boulder: Johnson Press. p. 91. . Important historic and archaeological sites are registered nationally with the National Register of Historic Places (National register) and within the state's Colorado State Register of Historic Properties (State register). Most of the sites below are registered in one more both registers and was the source for most of the information for this section:National & State Registers. Colorado Historical Society, Office of Archaeology and Historic Preservation. Retrieved 10-7-2011.National register in Colorado American Dreams, Inc. Retrieved 2011-10-7. __TOC__
Prehistoric sites in Colorado