Connecticut Triathlon Calendar 2025-2026

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Explore the best triathlons in Connecticut for 2025-2026! Our updated list features 127 exciting races across the region. Find your next race in Connecticut below and join the running community at these great events!

October 2025
Oct
5
Sunday

Nipmuck Trail Marathon

Trail Run 26 mi
Oct
5
Sunday

Apple Harvest Road Races

2 mi 5 km 5 mi
Oct
5
Sunday

Norfolk Land Trust Trail Race Series

Trail Run 5 km 10 km 13 mi
Oct
5
Sunday

SoNo Half Marathon

5 km 13 mi
Oct
11-12
Sa - Su

Forbidden Forest 30 Hour Ultra Run

Backyard Ultra 26 mi 50 km ... 100 mi 30 hr
Oct
11
Saturday

Hartland Harvest Run

3 km 5 km
Oct
11
Saturday

Hartford Marathon

5 km 13 mi 26 mi
Oct
12
Sunday

Mohawk Mountain Race

Trail Run 5 km 10 km 13 mi 26 mi
Oct
18
Saturday

The Little Guild Run & Wag 5K

5 km
Oct
18
Saturday

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

5 km
Oct
18
Saturday

Tackle the Trail - Pomfret, CT

Trail Run 10 km 13 mi 26 mi
Oct
18
Saturday

Weekend Funrun Fairfield County 5K Run/Walk

5 km
Oct
19
Sunday

Bimblers Bluff 50k

Trail Run 50 km
Oct
25
Saturday

Donny's Dash

5 km
Oct
26
Sunday

Abner Oakes III Veterans Run 10K

5 km 10 km
Oct
26
Sunday

CT LEO Memorial Run

5 km
Oct
26
Sunday

Black Dog Road Race

5 km 10 km
Oct
26
Sunday

The Reservoir Run Half Marathon

5 km 13 mi
Oct
26
Sunday

Masquerade 5k

5 km
November 2025
Nov
1
Saturday

Lyman Orchards Pie Run

5 km 5 mi
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