Isla Contoy is one of Mexico’s most pristine and protected natural treasures. This uninhabited island nature reserve sits just 30 kilometers north of Cancun and a short boat ride from Isla Mujeres, and access is strictly controlled: only 200 visitors are permitted per day, and the island can only be reached by organized boat tour. The result is an experience that feels genuinely untouched, with dense mangroves, nesting grounds for over 150 species of birds including frigatebirds, brown boobies, and roseate spoonbills, and some of the clearest water and healthiest coral in the region. Isla Contoy is part of the Mesoamerican Barrier Reef system, making the snorkeling here exceptional. Most tours combine Isla Contoy with a stop at Isla Mujeres, making for a full and memorable day on the water. If you are looking for a day trip from Cancun that puts nature first, Isla Contoy belongs at the top of your list. Our Isla Contoy guides cover everything you need to know to book the right tour, what to expect, and how to make the most of your visit.