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!

October 2025
Oct
5
Sunday

Def Dash 5k

5 km
Oct
11-12
Sa - Su

Cape Cod Marathon Weekend

5 km 13 mi 26 mi
Oct
12
Sunday

Nantucket Half Marathon

6 mi 13 mi
Oct
12
Sunday

Austin Reardon Memorial 5K

5 km
Oct
12
Sunday

Boston Firefighters Memorial Road Race

10 km
Oct
18
Saturday

Mt. Tom Trail Race

Trail Run 5 km 10 km 25 km
Oct
18
Saturday

Miles for Mary

5 km
Oct
19
Sunday

Around Cape Ann Half Marathon

13 mi
Oct
19
Sunday

Baystate Marathon

13 mi 26 mi
Oct
19
Sunday

Scaredy Cat 5K

5 km
Oct
19
Sunday

Run the Res 5k

5 km
Oct
25
Saturday

Womp Romp

Trail Run 10 mi 50 km
November 2025
Nov
1
Saturday

TARC Stone Cat Trail Festival

Trail Run 10 km 21 km ... 50 mi 100 km
Nov
2
Sunday

Ocean View Half Marathon

5 km 13 mi
Nov
2
Sunday

South Shore Half Marathon

5 km 13 mi
Nov
2
Sunday

Cambridge Half Marathon

13 mi
Nov
2
Sunday

Western Mass 10

5 km 10 mi
Nov
8-9
Sa - Su

Fenway Spartan Stadion Event Weekend

Obstacle Run 5 km
Nov
8
Saturday

DAV 5K

5 km
Nov
8
Saturday

Orange Turkey Trot

5 km
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