Mount Desert Island Marathon

OCT
19
2025
Read all about the Mount Desert Island Marathon on 19 Oct 2025 in Bar Harbor.
Sun 19 Oct 2025
26 miles 13 miles

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Event overview

The Mount Desert Island Marathon, Half & Relay is a road race event held on Mount Desert Island in Maine. It is hosted by the running club Crow Athletics and is held annually the weekend following Indigenous Peoples’ Day. The event includes multiple race options and has an award-winning course that has received national and international accolades. Races take place in the fall, during peak foliage season.

Race types and course

  • Marathon
  • Half-Marathon
  • Team Relay (includes a Public Safety Relay and other relay formats)
  • Kids Run and related series events

The Marathon and Team Relay start in Bar Harbor. The Half-Marathon starts in Northeast Harbor. All races finish in Southwest Harbor on the island’s quieter side. The course passes lakes, mountains, small villages, and seaside views, and includes Somes Sound, which is identified as the only fjord on the Eastern Seaboard. The route runs alongside parts of Acadia National Park and highlights fall scenery common to the region. Visit the organization's website for the most recent information.

26 mi
Marathon
13 mi
Half Marathon
Team Relay

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