Catalina Adventure Tours, Inc.: Semi-submersible underwater and glass bottom boat excursions, walking and bus tours. Features company profile, news and media gallery, vessel specifications, seat sales, and merchandise.
Catalina Island Information Guide: Visitor's information the Catalina Passenger Service. Lists over 300 activities and companies.
Catalina.com: Visitor information includes activities, lodging, transportation, local history and wildlife.
CTC Destination and Meeting Management: Group and individual hotel, tour, and transportation packages.
eCatalina.com: Includes calendar of events, shopping, dining, transportation and wedding resources.
Visit Catalina Island: Visitors guide to the island. Includes reservation links, tours, webcams, image galleries, and information for Avalon and Two Harbors.
Visiting Catalina: Visitor information with a heavy emphasis on diving.