IRONMAN 70.3 Wisconsin

IRONMAN 70.3 Wisconsin takes place in Madison, Wisconsin, on September 12, 2026. The event offers the standard half-distance triathlon format: a 1.2-mile swim, a 56-mile bike and a 13.1-mile half marathon run, for 70.3 miles in total.

A 70.3 is a serious but reachable target for athletes who have finished an Olympic-distance triathlon and can comfortably run a half marathon. As a runner, your biggest adjustment is learning to run well on legs that have just spent three hours on the bike, so brick sessions, a bike ride followed immediately by a run, should be a weekly fixture in the last two months of a 16- to 20-week build. Pacing the bike conservatively and fueling steadily from the first hour are what make the run feel like a run rather than a survival march.