Depths rarely exceed 40 feet (12 meters) in the Columbia Shallows, making this portion of the reef ideal for snorkelers, photographers, and novice divers. Columbia Deep, with an impressive drop-off of 80 feet (24 meters) is better suited for experienced divers looking to explore caves and tunnels.
Because of its proximity to Cozumel, Columbia Reef is best explored on a snorkeling or diving tour from the island’s downtown marina. Most excursions visit Columbia Reef along with Palancar Reef and El Cielo Marine Park, and sometimes include hotel pickup and drop-off.