HALF IRON MONTERREY MEXICO – where the sun is shining and the competition is fierce! Get ready to take on this challenging course that will test your strength, endurance, and determination. The swim portion of the race takes place in the serene waters of Santa Lucia River. The course is a single loop that measures 1.2 miles (1.9 kilometers). The water is warm and clear, with an average temperature of 75°F (24°C), making for a refreshing and enjoyable swim. Once out of the water, it's time to ...