racecast.ioPartly cloudy throughout the day.
Details
Pre-Race
Race
Post-Race
No slip. No bounce. Polarized sunglasses built for the run. Goodr OG Sunglasses.
When you buy through our links, we may earn a commission.
Wanna to know when the weather changes? .
Race Overview
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.
WikipediaThe 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.
FAQ
When is the 2026 Champlain Islands Marathon?
The 2026 Champlain Islands Marathon will be held on Sunday October 18, 2026.
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.
Champlain Islands Marathon Weather History
Champlain Islands Marathon Weather Averages
Average Temp: 52°, Average Low: 42°, Average High: 61°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 49° | 52° | 54° | 56° | 58° | 59° |
| Feel | 48° | 51° | 54° | 56° | 57° | 58° |
| Rain | - | - | - | - | - | - |
| Wind | 5mph | 8mph | 8mph | 10mph | 10mph | 10mph |
| Dew | 41° | 41° | 41° | 40° | 41° | 41° |
| RunScore |  | | | | | |
Champlain Islands Marathon 2025
Oct 19, 2025
Clear conditions throughout the day.
Low: 43°, High: 74°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp |  49° | 59° | 61° | 65° | 67° | 70° |
| Feel | 49° | 59° | 61° | 65° | 67° | 70° |
| Rain | - | - | - | - | - | - |
| Wind | 1mph | 11mph | 16mph | 19mph | 22mph | 18mph |
| Dew | 44° | 46° | 46° | 47° | 48° | 50° |
| RunScore | | |  |  | | |
Champlain Islands Marathon 2024
Oct 20, 2024
Clear conditions throughout the day.
Low: 35°, High: 67°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 45° | 53° | 57° | 60° | 62° | 64° |
| Feel | 45° | 53° | 57° | 60° | 62° | 64° |
| Rain | - | - | - | - | - | - |
| Wind | 1mph | 1mph | 7mph | 11mph | 14mph | 14mph |
| Dew | 38° | 39° | 42° | 43° | 44° | 44° |
| RunScore | | |  | | | |
Champlain Islands Marathon 2023
Oct 22, 2023
Cloudy skies throughout the day with rain.
Low: 42°, High: 49°, Light Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp |  46° | 47° | 46° | 47° | 47° |  47° |
| Feel | 42° | 41° | 45° | 43° | 44° | 44° |
| Rain | - | - | - | - | - | light |
| Wind | 9mph | 12mph | 4mph | 7mph | 8mph | 6mph |
| Dew | 36° | 36° | 36° | 35° | 35° | 36° |
| RunScore | | | | | | |
Champlain Islands Marathon 2022
Oct 16, 2022
Becoming cloudy in the afternoon.
Low: 39°, High: 59°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 45° | 50° | 54° | 56° | 57° | 58° |
| Feel | 45° | 50° | 54° | 56° | 57° | 58° |
| Rain | - | - | - | - | - | - |
| Wind | 0mph | 3mph | 6mph | 8mph | 6mph | 8mph |
| Dew | 38° | 40° | 38° | 36° | 37° | 36° |
| RunScore | | | | | | |
Champlain Islands Marathon 2021
Oct 17, 2021
Partly cloudy throughout the day with rain.
Low: 45°, High: 60°, Light Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 51° | 54° | 57° | 56° | 58° | 59° |
| Feel | 51° | 54° | 57° | 56° | 58° | 59° |
| Rain | - | - | - | - | - | - |
| Wind | 5mph | 6mph | 7mph | 6mph | 7mph | 6mph |
| Dew | 44° | 45° | 45° | 44° | 43° | 43° |
| RunScore | | | | | | |
Champlain Islands Marathon 2019
Oct 13, 2019
Partly cloudy throughout the day.
Low: 42°, High: 60°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 50° | 55° | 55° | 57° | 58° | 59° |
| Feel | 48° | 55° | 55° | 57° | 58° | 59° |
| Rain | - | - | - | - | - | - |
| Wind | 6mph | 5mph | 7mph | 7mph | 8mph | 8mph |
| Dew | 40° | 38° | 36° | 36° | 35° | 35° |
| RunScore | | | | | | |
Champlain Islands Marathon 2018
Oct 14, 2018
Partly cloudy throughout the day.
Low: 35°, High: 56°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 44° | 48° | 51° | 54° | 55° | 56° |
| Feel | 44° | 46° | 51° | 54° | 55° | 56° |
| Rain | - | - | - | - | - | - |
| Wind | 1mph | 5mph | 6mph | 6mph | 5mph | 5mph |
| Dew | 36° | 35° | 34° | 32° | 31° | 32° |
| RunScore | | | | | | |
Champlain Islands Marathon 2017
Oct 15, 2017
Partly cloudy throughout the day with late afternoon rain.
Low: 56°, High: 74°, Light Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 62° | 63° | 64° | 67° | 71° | 71° |
| Feel | 62° | 63° | 64° | 67° | 71° | 71° |
| Rain | - | - | - | - | - | - |
| Wind | 15mph | 14mph | 17mph | 22mph | 20mph | 21mph |
| Dew | 56° | 56° | 57° | 57° | 58° | 58° |
| RunScore | | | |  | | |
Champlain Islands Marathon 2016
Oct 9, 2016
Partly cloudy throughout the day.
Low: 49°, High: 57°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 52° | 53° | 54° | 56° | 57° | 55° |
| Feel | 52° | 53° | 54° | 56° | 57° | 55° |
| Rain | - | - | - | - | - | - |
| Wind | 4mph | 10mph | 10mph | 11mph | 11mph | 12mph |
| Dew | 43° | 43° | 42° | 41° | 40° | 40° |
| RunScore | | | | | | |
Champlain Islands Marathon 2015
Oct 11, 2015
Partly cloudy throughout the day.
Low: 38°, High: 64°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 50° | 51° | 54° | 57° | 59° | 62° |
| Feel | 47° | 51° | 54° | 57° | 59° | 62° |
| Rain | - | - | - | - | - | - |
| Wind | 7mph | 12mph | 9mph | 12mph | 13mph | 13mph |
| Dew | 41° | 41° | 42° | 44° | 45° | 46° |
| RunScore | | | | | | |
Champlain Islands Marathon 2014
Oct 12, 2014
Clear conditions throughout the day.
Low: 35°, High: 55°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 46° | 49° | 52° | 53° | 54° | 54° |
| Feel | 45° | 47° | 52° | 53° | 54° | 54° |
| Rain | - | - | - | - | - | - |
| Wind | 3mph | 7mph | 5mph | 9mph | 7mph | 8mph |
| Dew | 40° | 37° | 34° | 33° | 33° | 32° |
| RunScore | | | | | | |
Champlain Islands Marathon 2012
Oct 14, 2012
Partly cloudy throughout the day with rain clearing later.
Low: 40°, High: 54°, Moderate Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 45° | 45° | 47° | 47° | 47° | 49° |
| Feel | 40° | 41° | 44° | 46° | 46° | 48° |
| Rain | light | - | - | - | - | - |
| Wind | 9mph | 8mph | 5mph | 3mph | 4mph | 3mph |
| Dew | 41° | 42° | 42° | 43° | 44° | 45° |
| RunScore | | | | | | |
Champlain Islands Marathon 2011
Oct 16, 2011
Cloudy skies throughout the day with rain.
Low: 47°, High: 59°, Light Rain
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|
| Temp | 52° | 53° | 54° | 55° | 57° | 57° |
| Feel | 52° | 53° | 54° | 55° | 57° | 57° |
| Rain | - | - | - | - | - | - |
| Wind | 9mph | 6mph | 8mph | 9mph | 8mph | 10mph |
| Dew | 37° | 38° | 36° | 36° | 36° | 36° |
| RunScore | | | | | | |