KIDS DAY at The Boston Tri

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 17, 2024. 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 17th.


  • Kids Fun Run, Ages 1-7: 100-yard run at the Finish Line in Mother’s Rest
  • Kids Splash & Dash, Ages 11-15: 200-yard swim, 2K run at the McCormack Bath House, Carson Beach
  • Kids Splash & Dash, Ages 7-10: 100-yard swim, 1K run after previous race at McCormack Bath House, Carson Beach