Ironman 70.3 Michigan

SEP

20

2026

Experience a scenic triathlon in the lakeside town of Frankfort featuring a swim in Betsie Bay and a bike course along historic highway M22. This event offers a fast course through the Michigan countryside.

Sun 20 Sep 2026

Frankfort, Michigan

Website

Swim Run Bike

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Event Overview

IRONMAN 70.3 Michigan takes place in the resort town of Frankfort, located on the shores of Lake Michigan. The event is a triathlon consisting of swimming, cycling, and running sections. The local community in Benzie County hosts the competition, which has previously served as a qualifier for the IRONMAN 70.3 World Championship.

The competition features a swim in Betsie Bay, where both the start and finish of the aquatic leg are positioned near the transition area. The water in the bay has an average temperature of 65 °F (18 °C).

The cycling portion follows a rolling course that utilizes historic highway M-22 and other roads throughout the flat countryside of Benzie County. Following the bike leg, the run consists of two out-and-back loops. This final stage is held on paved trails and roads surrounding Betsie Bay.

Weather conditions in the region during this time of year typically range from a low air temperature of 39 °F (10 °C) to a high of 52 °F (17 °C). The event offers options for individual athletes and relay teams.

The event includes the following disciplines: Visit the organization's website for the most recent information.