New Hampshire Triathlon Calendar 2025-2026

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Explore the best triathlons in New Hampshire for 2025-2026! Our updated list features 79 exciting races across the region. Find your next race in New Hampshire below and join the running community at these great events!

August 2025
Aug
10
Sunday

Sabine Strong 3.3

3 mi
Aug
13
Wednesday

DARE Classic 5K

5 km
Aug
15-17
Fr - Su

Jigger Johnson Ultras

Trail Run 20 mi 58 mi 108 mi
Aug
15
Friday

Summer Nights 5,000

5 km
Aug
16
Saturday

GTA Challenge

Trail Run 10 km
Aug
16
Saturday

The Webb Forest Wander

Trail Run 3 mi
Aug
16
Saturday

Riverside Assembly 5k

5 km
Aug
21
Thursday

Saunders 10k

Aug
21
Thursday

Anna's Run 4-Miler

4 mi
Aug
30
Saturday

Black Bear Trail Races

Trail Run 4 mi 23 km 50 km
Aug
30
Saturday

Run Your Buns Off 4.2 Miler

4 mi
Aug
30
Saturday

Stag Stampede 5k

5 km
Aug
31
Sunday

Swanzey Covered Bridges Half-Marathon

21 km
September 2025
Sep
1
Monday

Labor Day Francestown 5

5 km 5 mi
Sep
1
Monday

Race to Serve Labor Day

5 km 10 km
Sep
6
Saturday

Miles For Meals 5k - Nashua

3 km 5 km
Sep
6
Saturday

Plaistow Community YMCA 5K Road Race

5 km
Sep
7
Sunday

Run to Fall 5k - Northwood

Trail Run 2 mi 5 km
Sep
13
Saturday

Call to Duty Memorial 10K

10 km
Sep
13
Saturday

Mandy's Angels Paws for a Cause 5K

5 km
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