Half Distance Triathlon Maine Overview Swim: The point-to-point swim in the Kennebec River. Athletes will benefit from the river's current, with an average water temperature of 69°F (21°C), leaving them energized for the race ahead. Bike: Spanning 56 miles in the picturesque Kennebec River Valley, the bike course offers a high-quality ride with a mix of adventurous climbs and sweeping descents through rural Maine towns. Run: This single-loop run course features flat to rolling terrain, ...