The flattest full-distance race in North America and a well-known Kona-qualifying and PB destination.
Swim in the Choptank River off Great Marsh Park; brackish, warm and occasionally choppy with wind.
Dead-flat two-lap course through the Blackwater National Wildlife Refuge — no climbing at all, but fully exposed to wind.
Flat multi-lap run along the Cambridge waterfront and through the historic town centre.
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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