A warm, flat and fast French classic in a belle-époque spa town, popular with athletes chasing a time.
Swim in Lac d'Allier, the dammed stretch of the Allier river through town — flat, warm and current-free.
Rolling but fast Bourbonnais countryside loops; steady rather than steep, with a handful of short climbs.
Flat four-lap run along both banks of the Allier through the spa-town parks, with dense shade and support.
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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