The season opener for many North American pros. Cool ocean swim and rolling coastal terrain.
Harbor swim — sheltered from Pacific swell but often cold.
Rolling bike through Camp Pendleton military base.
Two-loop coastal run on The Strand.
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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