National Historical Park
- Chaco Culture National Historical Park: December 19, 1980
- Chaco Canyon National Monument: March 11, 1907
Annual Visitors: 39,175 (2011)
Official Site: https://www.nps.gov/chcu/index.htm
President Theodore Roosevelt recognized these alluring ruins in 1907 when he designated Chaco Canyon a national monument. The ruins were placed on the National Register of Historic Places in 1966.
In 1980, the boundary of the national monument was enlarged by 20 square miles (52 square kilometers) and the monument became the Chaco Culture National Historical Park.
ARCHAEOLOGISTS: MORE PROTECTIONS NEEDED FOR CHACO REGION