MarathonRoad🇺🇸 Bar Harbor, United States

Mount Desert Island Marathon

Sunday, 18 October 2026Estimated dateIn 7 days · Start 08:00

Runs from Bar Harbor around Somes Sound past the edges of Acadia National Park in peak autumn colour, with a late climb at mile 25 before descending to the Southwest Harbor finish.

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Facts checked 11 Oct 2026 against runmdi.org, runmdi.org, findmymarathon.com.

Elevation gain

500 m

Very hilly · ↓ 500 m

Highest point

75 m

above sea level

Temp at start

10°C

Peaks around 14°C

Entry fee

≈ $170

Open entry

Finishers

800

typical year

Course

Point to point

6.5h cut-off

Getting thereFly into PWM (Portland), about 187 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Very hilly: about 500 m of climbing and 500 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

10°C

Peak during race

14°C

Humidity

74%

Chance of rain

14%

Wind

15 km/h

Race day in past years

Historical averages for 18 October ±3 days, 2016–2025, from 08:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

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<a href="https://irun42.com/race/mount-desert" title="Mount Desert Island Marathon on iRun42"><img src="https://irun42.com/badge/mount-desert.svg" width="300" height="120" alt="Mount Desert Island Marathon: course, elevation and race-day weather on iRun42" /></a>