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Dive or Snorkel Isthmus Reef, Catalina Island, California

One of the easiest yet most interesting dives off Catalina is Isthmus Reef. Many student divers arrive here with their classes. Isthmus Reef is a submerged navigational hazard, roughly an acre in size, located directly landward of Bird Rock off Isthmus Cove. The reef rises from a depth of 150 feet to a shallow area that is exposed at low tide. Numerous vessels have struck the reef's high point, as many as 35 in one year.
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