A fast, flat, urban Ironman. Excellent for a first full-distance or a personal best attempt.
Two-loop swim in Alster Lake in the city centre.
Two-loop flat bike through the outskirts and countryside.
Four-loop urban run around the Alster with massive crowd 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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