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IRONMAN 70.3Sep

IRONMAN 70.3 Michigan

Frankfort, Michigan, United States

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The race

Northern Michigan at its best: clear freshwater swim, rolling dune-country roads and a small-town lakeshore run.

Course

SwimLake

1.9 km swim in Betsie Lake / Lake Michigan at Frankfort — clear, cool freshwater.

Bike750 m (2,461 ft) elev.

Rolling one-lap 90 km bike through the orchards and dune country of the Sleeping Bear region, with several sustained climbs.

Run150 m (492 ft) elev.

Two-lap 21.1 km run through Frankfort and along the lakeshore, rolling with a hill on each lap.

Historical weather · Sep

Actual monthly averages from the last 3 years (Open-Meteo). Real race day may vary.

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Water temp uses athlete-reported values first, then official race data, then the marine archive (sea swims, measured at the nearest offshore point). Values tagged est. are modelled from recent air temperature for lakes and rivers, where no observational data exists.

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