A tough, honest British race: cool water, hilly Yorkshire roads and huge urban crowds on the run.
Swim in Waterloo Lake at Roundhay Park, cool freshwater with a lakeside deep-water start.
Genuinely hilly Yorkshire course of steep, narrow lanes and long drags out through the dales — very little flat road.
Rolling multi-lap run leaving the park and heading into Leeds city centre, with a couple of sharp climbs each lap.
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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