New Hampshire Triathlon Calendar 2025-2026

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Explore the best triathlons in New Hampshire for 2025-2026! Our updated list features 92 exciting races across the region. Find your next race in New Hampshire below and join the running community at these great events!

October 2025
Oct
25
Saturday

NovusMage Demo Race

10 km 13 mi
Oct
26
Sunday

Seacoast Half Marathon

13 mi
November 2025
Nov
1
Saturday

Blackout 5k/10k

Trail Run 5 km 10 km
Nov
1
Saturday

The Hamsterwheel - New Boston, NH

Trail Run 6 hr 12 hr 24 hr 30 hr
Nov
2
Sunday

Dan Healy Memorial 5K

5 km
Nov
8
Saturday

Rescue Me 5K

5 km
Nov
8
Saturday

Donut Dash - Claremont

5 km
Nov
9
Sunday

Manchester City Marathon

5 km 13 mi 26 mi
Nov
27
Thursday

T4G (Thanks for Giving) 5k/10k

5 km 10 km
December 2025
Dec
6
Saturday

Krampuslauf

Trail Run 5 km 10 km 9 hr
March 2026
Mar
1
Sunday

Hampton Half Marathon

5 km 13 mi
Mar
14
Saturday

Lebanon Shamrock Shuffle

5 km
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