The way Kikkan Randall skied in Sun Valley on Wednesday, she still wasn’t beatable. But at the very least, she showed that she’s human. Randall had won Tuesday’s prologue, the opening stage of the 2011 SuperTour Finals, with a thoroughly dominating performance, putting more than 15 seconds into her nearest competitors in a seven-minute race. In Wednesday’s 10 k mass-start classic, Randall (APU/USST) was again impressive—at least, for nine kilometers. Heading out on her last...