Full Distance Triathlon Cozumel, Mexico – a renowned IRONMAN host city off Mexico’s Yucatán Peninsula, offers athletes a scenic and challenging race experience. Swim: A breathtaking open-water swim with crystal-clear visibility, abundant marine life, and an average water temperature of 79°F (26°C). Bike: A fast, scenic 180 km (112-mile) course with three laps around the island, featuring oceanfront roads, the hotel zone, and city areas—ideal for setting a personal record. Run: A flat 40 km ...