IRONMAN 70.3 Wisconsin

SEP

12

2026

IRONMAN 70.3 Wisconsin in Madison on September 12, 2026 combines a Lake Monona swim, a rolling bike course and a hilly waterfront run that finishes by the Wisconsin State Capitol. The event also offers qualification for the 2027 IRONMAN 70.3 World Championship.

Sat 12 Sep 2026

Madison, Wisconsin

Website Registration

70.3 Miles

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IRONMAN 70.3 Wisconsin - Madison, United States

IRONMAN 70.3 Wisconsin is a half-distance triathlon held in Madison on September 12, 2026. The event features open-water swimming in Lake Monona, a cycling course described as rolling, and a run course that follows the Madison waterfront and is described as hilly.

The swim water temperature is listed at an average of 71 °F / 22 °C. Typical air temperatures for the event are shown as a high of 79 °F / 26 °C and a low of 52 °F / 11 °C. The course finish is located with the Wisconsin State Capitol as a backdrop, and the race uses a helix transition route through the Monona Terrace.

General registration for the event is sold out, with special entry options noted. The race is listed as a qualifier for the 2027 IRONMAN 70.3 World Championship and is positioned within a broader race week in Madison that includes community and spectator offerings. Visit the organization's website for the most recent information.

70 mi

70.3 Miles