Champlain Islands Half Marathon

South Hero, VT, USA · October 18, 2026·
partly-cloudy-day35°·39° high·Windy·Dry
8
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Race Day Weather

partly-cloudy-day
35°at start
45° high
Windy
Dry
Your goal
0:00:00

Cold start — layer up, moderate wind

Runners will start in chilly 35°F conditions — dress in layers for the corral and plan to shed early. Temperatures rising to 45°F through the course will gradually increase perceived effort in the second half. Moderate winds around 18mph may affect pacing on open sections of the course.

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Pace Calculator

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Race Plan

Get your personalized Champlain Islands 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 Champlain Islands Half Marathon runs out and back along the west shore of South Hero and Grand Isle in Lake Champlain, passing farms, apple orchards, and summer cottages. The course is flat to rolling and entirely paved, starting and finishing at Folsom Elementary School in South Hero, near the former home of seven-time Boston Marathon winner Clarence H. DeMar. It is USATF-certified and qualifies for Boston Marathon entry.

Race weekend

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

FAQ

When is the 2026 Champlain Islands Half Marathon?

The 2026 Champlain Islands Half Marathon will be held on Sunday October 18, 2026.

What is the time limit for the Champlain Islands Half Marathon?

The time limit for the Champlain Islands Half Marathon is 4 hours.

What will the weather be like for the 2026 Champlain Islands Half Marathon?

The forecast calls for a high of 45°F and a low of 35°F with a 17% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

Historical Weather

Based on 13 years of data
Avg Temp
49°F
L:45° H:52°
RunScore
9
Conditions
Rain Freq
8%
1 of 13 yrs
Wind6mph
Dew41°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-day
43°/59°-
9
2024
partly-cloudy-day
37°/53°-
10
2023
cloudy
45°/47°-
10
2022
clear-day
39°/50°-
10
2021
partly-cloudy-day
47°/54°-
10
2019
partly-cloudy-day
44°/55°-
10
2018
partly-cloudy-day
38°/48°-
10
2017
partly-cloudy-day
62°/63°-
6
2016
partly-cloudy-day
51°/53°-
10
2015
partly-cloudy-day
47°/51°-
9
2014
clear-day
38°/49°-
10
2012
cloudy
44°/45°Light
10
2011
partly-cloudy-day
50°/53°-
10