Hovenweep National Monument is located on land in southwestern Colorado and in San Juan County, Utah, between Cortez, Colorado and Blanding, Utah on the Cajon Mesa of the Great Sage Plain. Shallow tributaries run through the wide and deep canyons into the San Juan River. Although Hovenweep National Monument is largely known for the six groups of Ancestral Puebloan villages, there is evidence of occupation by hunter-gatherers from 8,000 to 6,000 B.C. until about AD 200. Later, a succession of early puebloan cultures settled in the area and remained until the 14th century.