Busselton, Western Australia, Australia
The flattest, fastest half in Australia — jetty swim and pancake-flat bike and run.
1.9 km swim in the calm, shallow water alongside the historic Busselton Jetty in Geographe Bay.
Dead-flat out-and-back on the Vasse Highway through farmland; wind is the only difficulty.
Flat two-lap run on the foreshore path with the jetty as a backdrop.
Actual monthly averages from the last 3 years (Open-Meteo). Real race day may vary.
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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