Boston’s Only


August 17-18, 2024


  • DAYS

August 17 Packet Pick-Up & Kids Day
August 18 Sprint & Olympic Triathlon
August 18 supertri Boston

The Columbia Threadneedle Investments Boston Triathlon returns to the city August 17-18, 2024 – and we couldn’t be more excited to welcome you back!  2024 will be like not other year in Boston! Celebrate your season with this historical, scenic, fun and exciting Sprint & Olympic distance event and spectate a new professional race! As a participant in the triathlon, you’ll swim in the fresh waters of Dorchester Bay, bike through Boston city streets, and run along the scenic Southie shoreline.

NEW FOR 2024! We are excited to host supertri Boston after the conclusion of our age group races on Sunday August 18th!



In 2024, we are thrilled to announce that the Columbia Threadneedle Investments Boston Triathlon will once again join other major urban triathlons in the U.S. as an Olympic Distance Race! The start and finish will be at DCR Carson Beach and DCR Mother’s Rest Fields, and will take advantage of the closed roads and pathways along the South Boston shoreline.



The swim course starts and finishes on DCR Carson Beach near the DCR McCormack Bathhouse and follows a trapezoidal path to the finish line.


The flat loop course is on a number of wide, car-free roads, including DCR William Day Blvd. The entire bike course will be closed to vehicular traffic and managed by state troopers.


The run course highlights the best of Boston , with spectacular views of the harbor and the Boston Skyline. It is a cross country style course through Moakley Park that finishes back at DCR Mother’s Rest Field.

Check out some highlights of the past


Participate as a Relay

Love to run, but hate to bike and swim? Grab two friends and sign up as a 3-Person Relay Team! For those who are up for a bigger challenge, we also offer an option for 2-Person Relay Teams. Bring old friends and make some new ones at this summer’s triathlon!


We’re excited to announce that the 2024 Columbia Threadneedle Investments Boston Triathlon will once again offer an Olympic Distance race! If you live outside of Boston, this is a perfect reason to visit. If you’re a local – Why travel elsewhere, when you can race in your backyard?


Encourage your friends, family or colleagues to join the fun by signing up as a team! The Annual Team Challenge is great ways to experience the Sprint & Olympic race from start to finish while participating in some friendly competition. Teams of 7 or more will be competing for bragging rights as the fastest Tri Team in Boston! In addition to bragging rights, $5k in price money will be up for grabs for the top three teams!


Want to make a difference in your community as you swim, bike and run? Raise critical funds for our Community Partner, Boston Medical Center.