Endurance Grid lists 254 running races in Connecticut, from September 2026 to August 2027 across 131 cities.
The running race calendar in Connecticut is busiest in October, November, and September, with races most often in Cornwall, Roxbury, New Haven, and Stratford.
Organized running races are one of the most accessible entry points into endurance sports. There’s a distance for every fitness level and a community at every start line. Distances run from 1-mile fun runs and 5Ks up through the 10K, half marathon, and marathon.
Most races are timed and chip-scored, with a mass or wave start and aid stations along the course. Big-city races keep the noise going the whole way; smaller races give you long stretches where it’s just you and the miles.
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Endurance races in Connecticut happening in the next 7 days, in date order. Browse what’s coming up and sign up soon.
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