The 2026 Mount Desert Island Half Marathon has concluded.Share your finish2026 Results

Mount Desert Island Half Marathon

Race complete
Bar Harbor, ME, USA · October 18, 2026·
clear-day35°·43° high·Light·Dry
10
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Race Day Weather

clear-day
35°at start
51° high
Breezy
Dry
Your goal
0:00:00

Cold start — layer up, big temp swing, moderate wind

Runners will start in chilly 35°F conditions — dress in layers for the corral and plan to shed early. Temps will climb significantly to 51°F by later miles, so expect fading conditions as the race progresses. Moderate winds around 13mph may affect pacing on open sections of the course.

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Pace Calculator

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Race Plan

Get your personalized Mount Desert Island Half Marathon race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The Mount Desert Island Half Marathon starts at the marathon's halfway point in the village of Northeast Harbor and finishes alongside the marathon in Southwest Harbor. The route runs along Somes Sound, the only true fjord on the Eastern Seaboard, climbs to the interior end of the fjord near mile 5, then rises gradually through the village of Somesville before a downhill final mile to the finish. It follows the USATF-certified back half of the marathon course.

Race weekend

Sunday, October 18
8:00 AMMarathon (26.2 mi)
8:00 AMMarathon Relay (26.2 mi)
8:30 AMHalf Marathon (13.1 mi)

FAQ

When is the 2026 Mount Desert Island Half Marathon?

The 2026 Mount Desert Island Half Marathon will be held on Sunday October 18, 2026.

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

The time limit for the Mount Desert Island Half Marathon is 4 hours.

What will the weather be like for the 2026 Mount Desert Island Half Marathon?

The forecast calls for a high of 51°F and a low of 24°F with a 0% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

Historical Weather

Based on 23 years of data
Avg Temp
47°F
L:44° H:49°
RunScore
9
Conditions
Rain Freq
13%
3 of 23 yrs
Wind8mph
Dew40°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
clear-day
35°/43°-
10
2025
clear-day
41°/51°-
10
2024
cloudy
37°/52°-
10
2023
clear-day
49°/52°-
10
2022
fog
47°/52°-
9
2019
clear-day
43°/46°-
10
2018
clear-day
42°/45°-
9
2017
clear-day
55°/62°-
7
2016
cloudy
51°/56°-
8
2015
clear-day
33°/35°-
8
2014
cloudy
45°/47°-
8
2013
cloudy
54°/58°-
8
2012
rain
44°/47°Light
9
2011
cloudy
55°/56°-
9
2010
clear-day
45°/49°-
9
2009
partly-cloudy-day
38°/39°-
10
2008
clear-day
30°/39°-
10
2007
clear-day
43°/47°-
10
2006
clear-day
43°/48°-
10
2005
rain
51°/52°Light
9
2004
cloudy
52°/53°-
9
2003
partly-cloudy-day
40°/43°-
10
2002
rain
46°/48°Light
9