Cowboy Wash is a group of nine archaeological sites in Montezuma County, southwestern Colorado, used by Ancestral Puebloans and discovered in 1993 during an archaeological dig. The primary site, designated 5MT10010, dates to approximately 1150 to 1175 A.D. and is located on the south slopes of Ute Mountain near Towaoc, approximately 15 miles west of Mesa Verde. Some archaeologists believe the site was settled by immigrants from Chaco Canyon or the Chuska Mountains, suggesting connections to broader Ancestral Puebloan migration patterns and settlement dynamics during the 12th century.
The excavation of the site revealed twelve human remains, five of which came from burials. The remaining seven skeletons exhibited extensive evidence of cannibalism, including defleshing, fragmentation of long bones to extract marrow, and bones that were chopped, cut, and blackened. A stone tool kit appropriate for butchering a mid-sized mammal was discovered at the site, providing material evidence of processing practices. The initial excavation was supervised by University of North Carolina archaeologist Brian Billman, who was employed by a private firm contracted by the Ute Mountain Ute Tribe.
The discovery of these remains and associated evidence contributes to ongoing archaeological understanding of violence and subsistence practices among Ancestral Puebloan communities during the 12th century. The site's significance lies in its documentation of intra-group conflict and the material culture associated with it, offering insights into the social and environmental pressures that may have influenced Ancestral Puebloan societies during this period.
Indigenous peoples had inhabited North America for at least 15,000 years before European contact, developing complex societies across every region of the continent. The Mississippian culture, centered on the city of Cahokia near present-day St. Louis, reached its peak around 1100 AD with a population estimated at 10,000 to 20,000 — larger than contemporary London. The Ancestral Puebloans built multi-story stone complexes at Chaco Canyon and Mesa Verde between the 9th and 13th centuries. The Iroquois Confederacy, formed between roughly 1450 and 1600, united five nations under a constitution that influenced later American democratic thinking. Across the eastern woodlands, the Great Plains, the Pacific Coast, and the Southwest, hundreds of distinct nations maintained sophisticated trade networks, agricultural systems, and governance structures. European contact beginning in the late 15th century introduced epidemic disease — smallpox, measles, influenza — which devastated Indigenous populations by an estimated 50 to 90 percent within a century.
Twelve human remains found at the site; seven exhibited signs of cannibalism
Pre-Columbian tribal groups — specific identities and numbers unknown; scale inferred from archaeological evidence
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