Massachusetts Triathlon Calendar 2025-2026

Jun

7

Sunday

Ironman 70.3 Western Massachusetts

Springfield, Massachusetts

Triathlon

IRONMAN 70.3 Western Massachusetts in Springfield on June 7, 2026 blends a downriver 1.2 mile swim, a hilly 56 mile bike through farmland, and a run through Forest Park into downtown. World Championship slots available.

Jun

20

Saturday

Against the Tide Hopkinton

Hopkinton, Massachusetts

Triathlon

Join Against the Tide, a family friendly swim, run and walk that raises funds for the Massachusetts Breast Cancer Coalition. Attend in Hopkinton on June 20 or Brewster on June 27, or join virtually June 20 to June 27.

Jun

20

Saturday

Hopkinton against the Tide

Hopkinton, Massachusetts

Multisport

Hopkinton Against the Tide features swims, runs and a walk at Hopkinton State Park to benefit the Massachusetts Breast Cancer Coalition. Join a team or race solo for a fun day of fitness and fundraising by the lake.

Jun

27

Saturday

Cape Cod against the Tide

Brewster, Massachusetts

Triathlon

Join the 27th Annual Cape Cod Against the Tide at Cliff Pond for a family friendly day of swims, runs, and a fitness walk raising funds for the Massachusetts Breast Cancer Coalition. Race or cheer on the community on beautiful Cape Cod.

Aug

2

Sunday

Greenfield Triathlon

Greenfield, Massachusetts

Triathlon