Connecticut Triathlon Calendar 2025-2026

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Explore the best triathlons in Connecticut for 2025-2026! Our updated list features 149 exciting races across the region. Find your next race in Connecticut below and join the running community at these great events!

March 2025
Mar
9
Sunday

Bolton Road Race

5 mi
Mar
9
Sunday

Courthouse O'Putnam 5K

5 km
Mar
15
Saturday

O'Niantic 5K

5 km
Mar
15
Saturday

Shamrock Run & Walk

2 mi 5 mi
Mar
15
Saturday

Catch A Leprechaun 5K

5 km
Mar
15
Saturday

Hebron Maple Festival Sap Run 5K

5 km
Mar
16
Sunday

O'Hartford 10K

5 km 10 km
Mar
16
Sunday

Run For The Shamrock

4 mi
Mar
22
Saturday

Daisy Dash - Westbrook

5 km
Mar
23
Sunday

Annual Johnny's Jog for Charity 5K

5 km
Mar
23
Sunday

Mount Archer Trail Race

Trail Run 3 mi 9 mi
Mar
29
Saturday

Savin Rock Marathon

13 mi 26 mi
Mar
29
Saturday

Northern Nipmuck Trail Race

Trail Run 16 mi
Mar
29
Saturday

Bradley Road Race - 10K

10 km
Mar
29
Saturday

Enchanted Forest Ultra Run

Backyard Ultra 50 km
Mar
29
Saturday

St. Joseph School 3 Mile

3 mi
Mar
29
Saturday

Fit for a Lifetime

5 km 10 km 13 mi
Mar
30
Sunday

Sleeping Giant Trail Runs

Trail Run 25 km 50 km
Mar
30
Sunday

Steam Train Half Marathon

13 mi
Mar
30
Sunday

NVCC Food Pantry Run/Walk

5 km
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