Run ThisRun This
    Create Your RaceFind EventsContact
    Create
    1. Run This/
    2. Races/
    3. Connecticut/
    4. Marathon

    Race calendar

    Marathon Races in Connecticut

    6 upcoming Marathon races across Connecticut. Run This events are listed first — pick a city below to narrow it down.

    Sort
    Search all races

    6 races

    Sat, Oct 10, 2026

    Eversource Hartford Marathon, Half Marathon, Relay & Charity 5K

    Hartford, CT

    OutsideMarathon5K

    Sat, Oct 17, 2026

    Tackle the Trail (TM)

    Northeast, CT

    OutsideMarathon10K

    Sat, Nov 14, 2026

    Roxbury Fall Classic

    Roxbury, CT

    OutsideMarathon31.1 mi

    Sat, Dec 5, 2026

    Make It Amazing: Marathon 20

    Trumbull, CT

    Outside

    Own a race in Connecticut?

    List it on Run This and it shows up right here, where runners are already looking. Run This is any race director's best friend and the most modern platform for your registration. Already listed? Claim it.

    List your race

    Fri, Mar 26, 2027

    LivFree 24 Hour Hockey Marathon - Connecticut

    Fairfield, CT

    Outside

    Sun, Apr 18, 2027

    Stamford Run Club 5k/10k/Half Marathon 2026

    Stamford, CT

    OutsideMarathon

    Don't lose this one.

    Save any Connecticut race to your calendar and we'll remind you when it matters.

    Create your free account

    Your whole running year, in one place.

    Follow your friends, save Connecticut races, and keep every start line in one calendar.

    Create your free account