Japan's Mizuho Nasukawa made the most of the third annual Sports Authority Rock 'n' Roll Marathon, which took place in downtown Denver Sunday. Event organizers say her time of 2:37:05 was the fastest ever recorded by a woman in Colorado. Photographer Brandon Marshall was on hand to capture the scene. See many of his photos below, and click to see our complete Rock 'n' Roll Marathon 2012 slide show.
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