Historical Marker
Hillsboro Historic District
Hillsboro was founded in the 1870’s after gold and silver was discovered in the surrounding Black Range. The town developed into an important mining and ranching center, and served as the Sierra County seat from 1884 to 1939. It was the site of several renowned trials, and is said to have had the last operating stage line in the United States. It became a historic district in 1986.
During World War II, New Mexico was the site of several top-secret military installations, including the Los Alamos National Laboratory, where the atomic bomb was developed. The laboratory is still one of the largest employers in the state and conducts research in fields such as nuclear energy and national security.