New Hampshire Triathlon Calendar 2025-2026

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Explore the best triathlons in New Hampshire for 2025-2026! Our updated list features 67 exciting races across the region. Find your next race in New Hampshire below and join the running community at these great events!

September 2026
Sep
20
Sunday

Wallis Sands Triathlon

Triathlon
Sep
27
Sunday

Clarence DeMar Marathon

Half Marathon Marathon
October 2026
Oct
3
Saturday

Friends of the Poor 5K

5 km
Oct
4
Sunday

Rockfest Half Marathon

5 km Half Marathon
Oct
10-11
Sa - Su

Midstate Massive Ultra Trail

Trail Run 50 km 50 mi 100 mi
Oct
18
Sunday

New England Half Marathon

Half Marathon
November 2026
Nov
7-8
Sa - Su

The Hamsterwheel - New Boston, NH

Trail Run
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