A map of the South Cape Mendocino State Marine Reserve and Sugarloaf Island, California Protected Marine Areas created by the California Department of Fish and Wildlife in 2013. Sugarloaf Island is a special closure zone as indicated by the pink ring. The cape is the westernmost point in California, and Sugarloaf Island is listed as the westernmost island in the state. It is 128 feet (39 meters) from mean sea level to the highest point and access is completely restricted.