Half Distance Triathlon Eagleman - Masters 40+ Training Plan This iconic race features a 1.2-mile swim in the tidal Choptank River, a fast 56-mile bike through scenic wildlife refuge roads, and a flat but challenging 13.1-mile run along riverside streets. Temperatures hover around 80°F, making smart preparation critical. You need more than just grit — you need a proven plan that builds endurance, strength, and speed for race day. Why This Training Plan Powers Your Half Distance Triathlon ...