Two Harbors, colloquially known as "The Isthmus", is a small unincorporated island village on Santa Catalina Island, California with a population of 298 (Census of 2000). It is the second center of population on the island, besides the city of Avalon.You will need to have your own boat or charter to get here. Camping is also available.  Avalon is the main city and Two Harbors is a lot smaller and is a cool spot to visit.