Available distances
About
The Mount Desert Island Marathon brings a marathon (26.2 miles / 42.2 km), a half marathon (13.1 miles / 21.1 km) and a marathon relay to Mount Desert, Maine, on October 18, 2026. Billed as the ultimate road race challenge, it takes runners through the breathtaking scenery of Acadia National Park.
Along the way, the course offers picturesque lakes, majestic mountains and sweeping ocean views, including the unique fjord of Somes Sound. The journey begins in Bar Harbor and Northeast Harbor and finishes in Southwest Harbor.
Prepare for Mount Desert Island Marathon with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
- Strava and Garmin sync: your sessions are analyzed and the plan adapts
- Target paces, long runs, key sessions: everything is calculated for race day
Races nearby
Other upcoming races around Mount Desert.
Firecracker 5K - Bar Harbor
Jul 4, 2027 · Bar Harbor, ME · 7 mi away
3.1 mi
Acadia Half Marathon and 10K
Jun 6, 2027 · Bar Harbor, ME · 7 mi away
13.1 mi · 6.2 mi
The MDI
Oct 18, 2026 · Bar Harbor, ME · 7 mi away
26.2 mi · 13.1 mi
Bar Harbor Bank & Trust Half Marathon and Fall 5k
Sep 11, 2027 · Bar Harbor, ME · 7 mi away
13.1 mi · 3.1 mi
Horseshoe Crab Run/Crawl
Jul 18, 2027 · Franklin, ME · 21 mi away
3.1 mi
Milbridge Days 5K & Fun Run
Jul 24, 2027 · Milbridge, ME · 26 mi away
3.1 mi