1950 Map of San Clemente Island North

About this map

The Isthmus anchors this 1950 coastal survey of the northern portion of San Clemente Island, where the land narrows between the Pacific Ocean and the sheltered waters of Northwest Harbor. Based on 1943 aerial photography and field checks, the topography reveals the isolation and navigational importance of the island during the mid-20th century. The presence of the North Head Lighthouse and additional Lighthouse installations near Wilson Cove underscores the maritime activity surrounding the island. Notable terrain features like the Shifting Sands and offshore hazards such as West Rock and Castle Rock are meticulously recorded. This map serves as a primary record of the island's physical state before significant modern modifications, showing exactly where early water sources like Well 2 were established in the rugged interior.