The largest county in the continental United States has seen its share of colorful pursuits of suspects and fugitives, including the search for the last Native American in the United States to be tracked to his tragic end by a lawman’s posse: Willie Boy at Ruby Mountain. San Bernardino County also was the setting for the shoot-outs at Baldy Mesa and Lytle Creek. Yet gunplay lore is only one aspect of the epic of the San Bernardino County Sheriff’s Department. Today the department deploys nearly 5,000 salaried and volunteer employees to protect and serve its 20,186 square miles of deserts, mountains, forests, and increasingly urban areas. This original cow-county sheriff’s office went through many developments that are detailed in these vintage photographs-sheriffs’ administrations, equipment, investigations, and other exploits-all culled from the department’s archives, private collections, the California Room of the San Bernardino Public Library, and the San Bernardino Pioneer Historical Society.