Massachusetts Triathlon Calendar 2025-2026

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Explore the best triathlons in Massachusetts for 2025-2026! Our updated list features 181 exciting races across the region. Find your next race in Massachusetts below and join the running community at these great events!

July 2025
Jul
19
Saturday

Savage Race - Boston

Obstacle Run 3 mi 7 mi
Jul
19
Saturday

Nantucket Triathlon

Triathlon
Jul
20
Sunday

Knights of Columbus Scholarship 5k

5 km
Jul
20
Sunday

IPA Half Marathon - Newburyport

5 km 13 mi
August 2025
Aug
3
Sunday

Funky Monkey

5 km 10 km 13 mi
Aug
3
Sunday

TripleThreat Half Marathon

5 km 13 mi
Aug
9
Saturday

Sweltering Summer Ultra

Trail Run 8 hr
Aug
9
Saturday

Mentoring Matters 5K

5 km
Aug
10
Sunday

Sharon Triathlon

Triathlon
Aug
16-17
Sa - Su

New England Spartan Event Weekend

Obstacle Run 5 km 10 km 4 hr
Aug
17
Sunday

Falmouth Road Race

7 mi
Aug
23
Saturday

Jug End Loop Ultra

Trail Run 4 mi
Aug
24
Sunday

New England Green River Marathon

26 mi
September 2025
Sep
1
Monday

Marshfield Run for the Hills

5 km
Sep
1
Monday

Walpole Labor Day Road Race

5 km 10 km
Sep
6
Saturday

Run to the Rock

5 km 10 km 13 mi
Sep
6
Saturday

HOOMPA Nickel 5 Miler Road Race

5 mi
Sep
6
Saturday

TARC Fall Classic

Trail Run 10 km 21 km ... 50 km 50 mi
Sep
7
Sunday

Waves of Hope 5K - Dennis

5 km
Sep
7
Sunday

Beantown Marathon

26 mi
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