Marina Puerto Juarez dispatches more than forty party catamarans each week toward Isla Mujeres, a fifteen-kilometer sail that follows the same shelf Spanish galleons used to dodge reefs in the sixteenth century. The modern catamaran booze cruise Cancun tradition began in the nineteen-nineties when dive operators realized that open bars and snorkeling gear attracted a different clientele than technical wreck dives — younger, louder, less interested in decompression tables. Today the format is standardized: dual-hull fiberglass vessels, capacity between forty and seventy passengers, departure windows between nine and ten in the morning to catch calm water before the afternoon chop arrives. The route crosses Bahía de Mujeres, a protected bay where the continental shelf drops from three meters to thirty in less than a kilometer. Most operators anchor near El Farito reef, a coral ridge that runs parallel to Isla Mujeres' western shore, offering visibility between twelve and twenty meters depending on the season. The Caribbean current here flows north at half a knot, gentle enough for novice snorkelers but strong enough to require drift protocols. Onboard, the open bar operates from departure until the return leg — typically rum, tequila, vodka, beer, and premixed cocktails served from insulated coolers restocked at the island turnaround. Isla Mujeres itself functions as the midpoint rest stop. Operators lease beach club access on Playa Norte, a crescent of white sand where the water stays waist-deep for thirty meters offshore. The stop lasts ninety minutes to two hours, time divided between the beach, lunch service — usually buffet-style ceviche, grilled fish, rice — and a walking loop through the island's compact downtown grid. The return sail departs mid-afternoon, and the open bar resumes. Most catamaran booze cruise Cancun tours conclude back at Puerto Juarez by five or six in the evening, timed to avoid the marina's rush-hour congestion when fishing charters and ferry traffic converge. The conservation fee — thirteen dollars per person, paid at the marina before boarding — funds reef monitoring and mooring buoy maintenance, infrastructure installed in two thousand eighteen after repeated anchor damage to El Farito's elkhorn coral stands. The fee is separate from tour pricing and non-negotiable, collected by port authority staff at the departure dock.