IRONMAN 70.3 Cozumel, where the sun, sand, and sea are just a few of the things that make this race a favorite among triathletes. The swim takes place in the crystal-clear waters of the Caribbean Sea, with a one-loop, 1.2-mile course. Athletes will swim along the coastline, taking in the stunning views of the island's white sandy beaches and vibrant marine life. The bike course is a flat and fast, 56-mile loop around the island, with a mixture of coastal and inland sections. You'll pass by ...