HALF IRONMAN 70.3 Louisville offers participants a challenging yet rewarding experience, starting with a 1.2-mile downstream swim in the Ohio River. The natural current assists swimmers, allowing them to appreciate the surroundings without the pressure of intense competition. The water temperature, averaging 80°F (27°C), creates a comfortable environment akin to an expansive open-air bathtub, albeit without the playful rubber duckies. Following the aquatic segment, athletes transition to a ...