Colombia Shallows

You roll in over white sand, and the reef arrives as separate coral heads three to nine metres tall, with wide sand channels running between them. Shops publish maximums between 12 and 15 m, and the working band is roughly 4 to 10 m. There is no wall and no ridge line to follow: you circle a head, cross a channel and come to the next.

The current is mild, so this is still a drift, but one you can steer. Because the heads stand apart, you can drop behind one, circle it and rejoin the group.

Colombia Shallows is a platform reef: low, isolated masses of coral on the shelf with no continuous crest. Most of Cozumel's platform reefs sit on the inner shelf, and the Colombia shoals are the exception, out on the outer platform in front of Punta Sur1.

Boats run it less often than its beginner grade would suggest, because boats carrying new divers usually stop at closer shallow reefs. Turtles on this stretch have a name for tolerating divers.

The park's own monitoring in 2020 named the Colombia reef among its healthiest, with a greater cover of the coral species most vulnerable to white syndrome2.

Colombia sits in the park's restricted-use zone, where groups are capped at six divers per guide1. The rest is the park baseline: an authorised guide in the water, 1.5 m of clearance from the coral, no gloves and no knives.

The park rests this reef through August and September together with four neighbouring reefs, and the same five were listed in 2020 and again in 202523. The list is set each cycle, so confirm which reefs are resting for your week.

On days when the lagoon is pushing fresh water out along this coast, the water turns cooler and cloudier, so stay within sight of the guide.