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The Columbia Threadneedle Investments Boston Triathlon is encouraging fitness and healthy activities in youth by introducing them to the multisport world. Boston’s only triathlon is inviting kids throughout Greater Boston to experience and combine a few of the different elements of a triathlon, including swimming and running at the annual Kids Day on August 26th, 2023. Thanks to our friends at Amazon, this year’s race is FREE for all kids. Click below to register your child. Please park in the parking lot of the Corcoran Jennison Companies Parking lot at 150 Mt. Vernon St. Dorchester, MA. Please note the UMASS Bayside lots are not available to the race on Saturday, August 26th.