This book presents a geographically organized historical tour of Mare Island Naval Shipyard in Vallejo, California, tracing its development from 1854 to its closure in 1996. Combining cartographic guidance, archival imagery, and narrative interpretation, the work documents the shipyard’s role in global naval logistics, shipbuilding innovation, Marine Corps mobilization, Cold War nuclear deterrence, and wartime industrial production. It is intended both as a scholarly resource and as a field guide for visitors seeking to understand the site’s historical significance as a National Historic Landmark.