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
- 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