A scenic and genuinely mountainous Japanese iron-distance with cool northern-island conditions and immaculate organisation.
Ocean swim in the sheltered bay on Hokkaido's southern coast, cool and clear.
Demanding coastal and mountain roads with long sustained climbs and fast technical descents.
Rolling run along the coast and through town, with steady gradients rather than flat sections.
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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