Redding, California, United States
Cool mountain-reservoir swim, a long descent into the valley and a hot, flat river-trail run — a race defined by Northern California August heat.
1.9 km swim in the cool, clear water of Whiskeytown Lake, a reservoir ringed by pine forest.
Rolling one-lap 90 km bike from the lake down into the Sacramento Valley, with a long descent early and rolling valley roads to the finish.
Two-lap 21.1 km run on the Sacramento River Trail and across the Sundial Bridge, mostly flat but exposed and very hot.
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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