The 2026 That Dam Hill Marathon has concluded.

That Dam Hill Marathon

Race complete
London, ON, Canada · September 19, 2026
cloudy58°·61° high·Breezy·Dry
7
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Race Day Weather

cloudy
58°at start
61° high
Breezy
Dry
Your goal
0:00:00

Cool rain, adjust gear accordingly

Runners will face temperatures ranging from 56°F to 61°F with a light rain throughout the race. Humidity will be high at 81%, creating a damp atmosphere. With a max wind of 13 mph from the E, runners should wear appropriate gear to stay comfortable and maintain a steady pace, ensuring hydration is prioritized.

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rain7
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Pace Calculator

Distance: 26.2mi
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Race Info

That Dam Hill Marathon in London, Ontario, offers a certified Boston Marathon Qualifier course that is both spectator-friendly and ideal for setting personal bests. The event features a variety of race options, including a marathon, half marathon, and multiple timed ultra races, all set within the scenic Springbank Park. Organized by dedicated volunteers, the race supports cancer research, with all net proceeds benefiting the Dunn with Cancer charity.

Race weekend

Saturday, September 19
8:00 AMMarathon (26.2 mi)
8:00 AMHalf Marathon (13.1 mi)
5K (3.1 mi)
Area Map

Course Map

FAQ

When is the 2026 That Dam Hill Marathon?

The 2026 That Dam Hill Marathon will be held on Saturday September 19, 2026.

Is the That Dam Hill Marathon a Boston Marathon Qualifier?

Yes, the That Dam Hill Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2026 That Dam Hill Marathon?

The forecast calls for a high of 61°F and a low of 55°F with a 100% chance of rain.

Historical Weather

Based on 7 years of data
Avg Temp
62°F
L:54° H:68°
RunScore
6
Conditions
Rain Freq
14%
1 of 7 yrs
Wind7mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-day
54°/70°-
7
2024
partly-cloudy-day
63°/78°-
4
2023
clear-day
48°/67°-
7
2022
cloudy
59°/72°-
5
2021
partly-cloudy-day
61°/70°-
6
2020
rain
36°/55°Light
10
2019
clear-day
58°/66°-
6