Half Distance Triathlon Louisville: Course Overview Swim Start with a 1.2-mile downstream swim in the Ohio River, featuring stunning downtown Louisville views. Athletes begin at Waterfront Park and finish at the Great Lawn, with water temps around 80°F (27°C). Bike The 56-mile bike course offers a scenic ride through Louisville’s River Road and the rolling hills of Oldham County’s horse country, returning to Waterfront Park. Run The 13.1-mile run passes through shaded Cherokee Park, looping ...