Half Distance Triathlon Louisville Overview Swim The 1.2-mile swim takes place in the Ohio River, offering a unique downriver course with the Louisville skyline as a scenic backdrop. Starting at Waterfront Park near River Park Place Marina, athletes finish at the Great Lawn, with water temperatures averaging 80°F (27°C). Bike The 56-mile bike course begins in Louisville and leads through the rolling hills of Oldham County’s picturesque horse country. Cyclists complete a single loop before ...