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Flickr/Dan Brock

Where: Raleigh, North Carolina

This nearly decade-old race was one of the first to combine binge-eating with running (funny it took so long to think of!). Nearly 8,000 runners cruise 2.5 miles out on the course, eat a dozen original glazed doughnuts (glad it’s not chocolate custard-filled), then waddle, walk or crawl back to the starting line at North Carolina State University’s bell tower. It’s no doubt, as organizers claim, “a test of physical fitness and gastrointestinal fortitude.” Next Race: February 2014