The 2025 event has concluded.

Mount Desert Island Marathon

Bar Harbor, ME, USA • October 19, 2025
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clear-day Clear conditions throughout the day.

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The Mount Desert Island Marathon, Half & Relay is North America’s premier destination road race. The award-winning course features miles of pristine terrain passing tranquil lakes, soaring mountains, sleepy Maine villages, and stunning seaside vistas —including Somes Sound, the only fjord on the Eastern Seaboard— all set against the awe-inspiring backdrop of Acadia National Park in peak fall foliage season. The Marathon and Team Relay start in the world-famous Bar Harbor, while the Half-Marathon starts in picturesque village of Northeast Harbor. All three races finish on the quietside of MDI in the hardworking lobster fishing community of Southwest Harbor. Source

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When is the 2025 Mount Desert Island Marathon?

The 2025 Mount Desert Island Marathon will be held on Sunday October 19, 2025.

Is the Mount Desert Island Marathon a Boston Marathon Qualfier?

Yes, the Mount Desert Island Marathon is an official Boston Marathon qualifier.

What is the time limit for the Mount Desert Island Marathon?

The time limit for the Mount Desert Island Marathon is 6.5 hours.

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Historical Weather & Results

RunScore
Run Score: 8
Temp
53°F
Min/Max
45°/54°F
Dew
38°F
Days of Rain
3/21
Wind
11mph
Tap a row for details.
YearLow / HighRainResults

Mount Desert Island Marathon 2024 Weather History

Partly cloudy throughout the day.

2024
cloudy
37°/ 70°-
Run Score: 8

Mount Desert Island Marathon 2023 Weather History

Becoming cloudy in the afternoon with late afternoon rain.

2023
clear-day
49°/ 56°-
Run Score: 9

Mount Desert Island Marathon 2022 Weather History

Clearing in the afternoon.

2022
fog
47°/ 62°-
Run Score: 9

Mount Desert Island Marathon 2019 Weather History

Clear conditions throughout the day.

2019
clear-day
43°/ 53°-
Run Score: 8

Mount Desert Island Marathon 2018 Weather History

Partly cloudy throughout the day.

2018
clear-day
42°/ 50°-
Run Score: 7

Mount Desert Island Marathon 2017 Weather History

Partly cloudy throughout the day.

2017
clear-day
55°/ 62°-
Run Score: 9

Mount Desert Island Marathon 2016 Weather History

Partly cloudy throughout the day.

2016
cloudy
51°/ 59°-
Run Score: 7

Mount Desert Island Marathon 2015 Weather History

Becoming cloudy in the afternoon.

2015
clear-day
33°/ 40°-
Run Score: 5

Mount Desert Island Marathon 2014 Weather History

Partly cloudy throughout the day with early morning rain.

2014
cloudy
45°/ 47°-
Run Score: 6

Mount Desert Island Marathon 2013 Weather History

Partly cloudy throughout the day with morning rain.

2013
cloudy
54°/ 60°-
Run Score: 8

Mount Desert Island Marathon 2012 Weather History

Cloudy skies throughout the day with rain clearing later.

2012
rain
44°/ 53°Light
Run Score: 7

Mount Desert Island Marathon 2011 Weather History

Partly cloudy throughout the day.

2011
cloudy
55°/ 58°-
Run Score: 8

Mount Desert Island Marathon 2010 Weather History

Partly cloudy throughout the day.

2010
clear-day
45°/ 56°-
Run Score: 7

Mount Desert Island Marathon 2009 Weather History

Partly cloudy throughout the day with rain.

2009
partly-cloudy-day
38°/ 43°-
Run Score: 7

Mount Desert Island Marathon 2008 Weather History

Clear conditions throughout the day.

2008
clear-day
30°/ 48°-
Run Score: 7

Mount Desert Island Marathon 2007 Weather History

Partly cloudy throughout the day.

2007
clear-day
43°/ 52°-
Run Score: 8

Mount Desert Island Marathon 2006 Weather History

Partly cloudy throughout the day.

2006
clear-day
43°/ 54°-
Run Score: 8

Mount Desert Island Marathon 2005 Weather History

Partly cloudy throughout the day with a chance of rain throughout the day.

2005
rain
48°/ 52°Light
Run Score: 6

Mount Desert Island Marathon 2004 Weather History

Partly cloudy throughout the day with morning rain.

2004
cloudy
52°/ 57°-
Run Score: 7

Mount Desert Island Marathon 2003 Weather History

Partly cloudy throughout the day.

2003
partly-cloudy-day
40°/ 46°-
Run Score: 8

Mount Desert Island Marathon 2002 Weather History

Partly cloudy throughout the day with morning rain.

2002
rain
46°/ 48°Light
Run Score: 8
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR