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IRONMAN 70.3Dec

IRONMAN 70.3 Western Australia

Busselton, Western Australia, Australia

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The race

The flattest, fastest half in Australia — jetty swim and pancake-flat bike and run.

Course

SwimBay

1.9 km swim in the calm, shallow water alongside the historic Busselton Jetty in Geographe Bay.

Bike120 m (394 ft) elev.

Dead-flat out-and-back on the Vasse Highway through farmland; wind is the only difficulty.

Run40 m (131 ft) elev.

Flat two-lap run on the foreshore path with the jetty as a backdrop.

Historical weather · Dec

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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