Canyons of the Ancients National Monument is located in the southwestern region of the U.S. state of Colorado, and is managed by the U.S. Bureau of Land Management, an agency within the U.S. Department of the Interior. Created by a Presidential proclamation on June 9, 2000, the monument encompasses 164,000 acres (663 km²) and surrounds three of the four separate sections of Hovenweep National Monument, which is administered by the National Park Service.
Canyons of the Ancients was set aside to preserve and protect the largest concentration of archaeological sites in the United States. As of 2005, over 6,000 individual archeological sites had been identified within the monument.
Canyons of the Ancients National Monument, located 9 miles west of Pleasant View, Colorado in southwestern Colorado, encompasses 164,000 acres (663 km²).[The monuments northern and eastern boundaries are canyons. Its western boundary is the Colorado-Utah state border. Lands south are bordered by the Ute Mountain Reservation and McElmo Creek.