Great Falls rewards athletes who can turn high-end fitness into controlled output over 140.6 miles. The Missouri River swim, exposed 112-mile bike course with approximately 3,000 feet of climbing, and two-loop 26.2-mile run demand more than a large aerobic engine. They demand decisions made well under fatigue. THE PERFORMANCE BRIEF: 24 WEEKS This Full Distance Triathlon plan is for the high-performance amateur who already has an established aerobic base. Week one begins with a 25-minute ...