Santa Catalina Island is a rocky island off the coast of Southern California in the Gulf of Santa Catalina. The island name is often shortened to Catalina Island or just Catalina. The island is 22 mi (35 km) long and 8 mi (13 km) across at its greatest width. The island is located about 29 mi (47 km) south-southwest of Long Beach, California. The highest point on the island is Mount Orizaba (2,097 ft (639 m)). Santa Catalina is part of the Channel Islands of California archipelago and lies within Los Angeles County. Anthony Scene video.