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Connecticut Marathon Calendar 2025-2026

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Monthly updates for Connecticut

Get new running races (and updates) in your inbox every month.

Explore the best marathons in Connecticut for 2025-2026! Our updated list features 5 exciting races across the region. Find your next race in Connecticut below and join the running community at these great events!

March 2026
Mar
28
Sa

Savin Rock Marathon

13 mi 26 mi
October 2026
Oct
3-4
Sa - Su

Forbidden Forest 30 Hour Ultra Run

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

Nipmuck Trail Marathon

Trail Run 13 mi 26 mi
Oct
17
Sa

Tackle the Trail - Pomfret, CT

Trail Run 10 km Half Marathon Marathon
November 2026
Nov
15
Su

Tarrywile Half Marathon

Trail Run 10 km Half Marathon Marathon