Two Harbors, colloquially known as "The Isthmus", is a small unincorporated community island village on Santa Catalina Island, California, with a population of 298. It is the second center of population on the island, besides the city of Avalon. It is mainly a resort village.
Avalon is the only incorporated city on Santa Catalina Island, in the California Channel Islands, and the southernmost city in Los Angeles County. The city is a resort community with the waterfront dominated by tourism-oriented businesses.