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Marathon Races in Marlborough, CT

1 upcoming Marathon race in Marlborough. Run This events are listed first.

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DistanceAll 5K Marathon Ultra

Nearby citiesRoxbury Cornwall Stratford Hamden New Haven Fairfield Bridgeport New London Groton Newtown Middlebury Meriden

1 race

Fri, Aug 14, 2026

Lake Terramuggus Olympic Triathlon

Marlborough, CT

Outside32.1 mi25.9 mi