Connecticut Triathlon Calendar 2025-2026

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Explore the best triathlons in Connecticut for 2025-2026! Our updated list features 148 exciting races across the region. Find your next race in Connecticut below and join the running community at these great events!

October 2026
Oct
3-4
Sa - Su

Iron Hike - Kuwohi Trail Marathon Plus Relay

Trail Run 28 mi
Oct
3-4
Sa - Su

Forbidden Forest 30 Hour Ultra Run

Backyard Ultra 26 mi 50 km ... 100 km 100 mi
Oct
4
Sunday

YWCA Greenwich Walk the Walk & 5K

5 km
Oct
4
Sunday

Fishbein YMCA Community Road Race

5 km
Oct
4
Sunday

SoNo Half Marathon

5 km Half Marathon
Oct
11
Sunday

Mohawk Mountain Race

Trail Run 5 km 10 km Half Marathon Marathon
Oct
17
Saturday

Sound Steps for Mental Health Recovery 5K Wellness Run/Walk

5 km
November 2026
Nov
21
Saturday

Storybook Half Marathon

Trail Run 13 mi
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