Shelter Island is a neighborhood of Point Loma in San Diego, California, United States. It is actually not an island but is connected to the mainland by a narrow strip of land. It was originally a sandbank in San Diego Bay, visible only at low tide. It was built up into dry land using material dredged from the bay in 1934. It was developed in the 1950s and contains hotels, restaurants, marinas, and public parkland.