Massachusetts Triathlon Calendar 2025-2026

Header image

Explore the best triathlons in Massachusetts for 2025-2026! Our updated list features 209 exciting races across the region. Find your next race in Massachusetts below and join the running community at these great events!

May 2026
May
16
Saturday

Runnin' for a Cause, Not from the Cops

5 km
May
17
Sunday

Harpoon 5-Miler

5 mi
May
17
Sunday

Evan's Run

5 km
May
30
Saturday

Wildcat 5K Trail Run-Walk-Wag

Trail Run 5 km
June 2026
Jun
7
Sunday

Ironman 70.3 Western Massachusetts

Triathlon
Jun
7
Sunday

Twin Lobster Half Marathon

13 mi
Jun
7
Sunday

Black Hat Brew 5k

5 km
Jun
14
Sunday

Battle of Bunker Hill 5K Road Race

5 km
August 2026
Aug
1
Saturday

Savage Race - Boston

Obstacle Run 3 mi 7 mi
Articles
Top 10 Marathons in the Netherlands — The Ultimate Dutch Marathon Bucket List: 10 Unmissable Races
The Beauty of the Easy Run — Why slowing down might be the smartest thing you do for your running
Mizuno Wave Rider 28: Elevating the Legacy of a Running Icon
Garmin Forerunner Review: Garmin Forerunner Series