Preparing for the Half Distance Triathlon Maine requires a training plan that reflects the race’s unique demands: a fast 1.2-mile river swim, a hilly 56-mile bike through the Kennebec River Valley, and a 13.1-mile run on rolling, shaded terrain. Designed for athletes 60 and over, this 36-week Half Distance Triathlon training plan aligns precisely with these course-specific challenges, supporting endurance, strength, and injury prevention. ✅ Builds Aerobic Endurance for River Swim The plan’s ...