Dive or Snorkel
Isthmus Reef, Catalina Island, California
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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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