13 racers completed the hardest stairmaster. At around 10 miles and 711 stairs a lap, yes A LAP. 7 people did two laps for over 1400 stairs. The top five did 3 laps for over 2100 stairs. Plus running up the steep side of the sledding hill each lap. For comparison, that is more stairs the the whole Hancock or about 200 stairs shy of climbing all 180 floors of the four presidential towers.
and your overall winner.

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a Chicago fixed gear forum comment on the tour da chicago, specifically the last stage: THE STAIRMASTER. man, i can not wait to do this next year.