running.services
    Marathon · Fort Collins

    Marathons in Fort Collins, CO in October

    Every marathon happening in or near Fort Collins during October. Sorted by date with deterministic 0–100 scores so you can pick the right one for your goal.

    We don't have enough data here yet, so this page isn't indexed by search engines.

    Open in race search for full filters →
    Marathon

    The Long View Marathon

    Sat, Oct 10, 2026
    Fort Collins, Colorado
    road
    Rolling
    60PR40value55vibe
    scenic
    Register
    Marathon

    Blue Sky Trail Marathon & Half Marathon

    Sat, Oct 17, 2026
    Fort Collins, Colorado
    trail
    Rolling
    30PR40value55vibe
    scenic
    Register

    Get an alert when a new race is added

    Save this search and we'll email you when a matching race opens registration or drops in price.

    Save this search

    Explore more

    5Ks in Fort Collins10Ks in Fort CollinsHalf Marathons in Fort CollinsTrail Races in Fort CollinsAll races in ColoradoMarathons in Fort Collins (all months)