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Ray Gobis

More than 34,000 runners took part in the Shamrock Shuffle, the unofficial start for race season for runners, on March 25, 2012. (Credit: CBS)

34K Run In Shamrock Shuffle For Unofficial Start Of Race Season

More than 34,000 runners have set off on another season of races here in Chicago, at the Shamrock Shuffle downtown on Sunday. While it’s not the first run of 2012, it’s the one that seems to get things started.

CBS Chicago–03/25/2012