Champlain Islands Marathon

South Hero, VT, USAOctober 19, 2025
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partly-cloudy-day Partly cloudy throughout the day.

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The certified (VT15301JK*) marathon and half-marathon begin and end near the house where Clarence H. DeMar, seven-time Boston Marathon Winner, once lived. The half-marathon course is out and back on the west shore of South Hero and Grand Isle; a land of farms, apple orchards, and summer cottages. The terrain is flat to rolling.

The entire course is paved. The full marathon course is two out-and-backs of the half-marathon course.

The time cut off for the marathon is 6 hours. The time cut off for the half-marathon is 4 hours.

*The certification is under the old race name, but applies to the new name as the course is unchanged. Formerly the Green Mountain Marathon.
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Area Map

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FAQ

When is the 2025 Champlain Islands Marathon?

The 2025 Champlain Islands Marathon will be held on Sunday October 19, 2025.

Is the Champlain Islands Marathon a Boston Marathon Qualfier?

Yes, the Champlain Islands Marathon is an official Boston Marathon qualifier.

What is the time limit for the Champlain Islands Marathon?

The time limit for the Champlain Islands Marathon is 6 hours.

Community

Historical Weather

RunScore
Run Score: 8
Temp
58°F
Min/Max
49°/58°F
Dew
40°F
Days of Rain
2/12
Wind
10mph
Tap a row for details.
YearConditionsLow / HighRainRunScoreResults
2024
partly-cloudy-day
45°/ 64°-
Run Score: 8
2023
cloudy
46°/ 47°Light
Run Score: 8
2022
clear-day
45°/ 58°-
Run Score: 9
2021
cloudy
51°/ 59°-
Run Score: 9
2019
clear-day
50°/ 59°-
Run Score: 9
2018
partly-cloudy-day
44°/ 56°-
Run Score: 9
2017
clear-day
62°/ 71°-
Run Score: 6
2016
partly-cloudy-day
52°/ 57°-
Run Score: 8
2015
partly-cloudy-day
50°/ 62°-
Run Score: 8
2014
clear-day
46°/ 54°-
Run Score: 9
2012
rain
45°/ 49°Light
Run Score: 8
2011
cloudy
52°/ 57°-
Run Score: 9