The fastest way to waste a strong swim is to overextend on the bike. The fastest way to compromise a marathon is to mistake early speed for sustainable performance. At Great Falls, Montana, full-distance racing becomes a test of how intelligently you distribute your fitness across 140.6 miles. Your objective: Develop the power, endurance and execution skills to race competitively without allowing one discipline to undermine the next. 36 WEEKS. TWO DISTINCT TRAINING INVESTMENTS. Weeks 1–12 | ...