Arguably the fastest full-distance course in the world: downstream swim, flat bike and flat run.
Downstream point-to-point swim in the Sacramento River with a helpful current.
Completely flat, wide, closed-road loops through the Sacramento valley farmland — extremely fast if the wind stays down.
Flat run on the American River Parkway bike paths and along the downtown waterfront.
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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