• MDI Marathon

    Categories

    Land ActivitiesFamily Friendly Activities

    About Us

    The Mount Desert Island Marathon, Half & Relay is North America’s premier destination road race! Held annually the weekend following Indigenous Peoples’ Day, this fall classic is locally operated and has earned national and international accolades.

    Events

    2025 MDI Marathon, Half & Relay
    2025 MDI Marathon, Half & Relay
    • The Mount Desert Island Marathon, Half & Relay is North America’s premier destination road race. The award-winning course features miles of pristine terrain pa ...
    • Sunday Oct 19, 2025