Boston’s Only


August 17-18, 2024!

  • DAYS

AUGUST 17-18, 2024 • Boston, MA

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! Celebrate your season with this historical, scenic, fun and exciting Sprint & Olympic distance event. 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.

Race for Boston!

Proudly partnering with Boston Medical Center to create a more equitable future for all.

Make your miles meaningful. Team up with our Official Charity Partner, Boston Medical Center! Fundraise or donate to support BMC’s innovative efforts to advance health equity and close outcome gaps linked to race and wealth. Learn More

Registration will soon be open for one of the biggest events of the summer and start training with friends. It will be a blast for athletes of all abilities, as well as volunteers, friends and family members!


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 loop course 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 2021 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 Tri Club Challenge or the Boston Corporate Cup are great ways to experience the Sprint & Olympic race from start to finish while participating in some friendly competition. Teams of 5 or more will be competing for bragging rights as the fastest Tri Club team or fastest Corporate team in Boston!


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

  • Personalized fundraising page to share with friends and family
  • Fundraising resources, tips and tricks from BMC staff
  • Access to a triathlon training program and a race prep clinic by Coach Susan Sotir from Breakthrough Performance Coaching upon creating a fundraising page
  • Fundraising incentives when you reach key milestones:
    • $500: Team BMC swim cap, sports towel, and access to two open water swimming clinics, the Pre-Race Prep Clinic, and Race Jitters Clinic with Coach Susan Sotir from Breakthrough Performance Coaching
    • $1,000: VIP parking & Team BMC baseball hat
    • $1,500: Race for free! Fundraisers who reach $1,500 will be refunded their race registration
    • $2,500: BMC duffle backpack, priority bike placement, and designated swim start
    • $5,000: Access to the Columbia Threadneedle Investments hospitality tent for you and a guest