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In 2009, the very first B.A.A. 5K was held to kick off the Boston Marathon weekend. Since then, this has become a memorable highlight, getting racers and spectators ready for Marathon Monday. Participants race over the Boston Finish Line as they cruise towards the 5K end and take in the beautiful Boston downtown sites and sounds! If you want a loud, FAST, and stoke-inducing urban 5K - the B.A.A. 5K will not disappoint.