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Treherne Marathon

Race complete
Treherne, MB, Canada · September 20, 2026
clear-day46°·62° high·Light·Dry
9
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Race Day Weather

clear-day
46°at start
62° high
Light
Dry

Cool start — fast day potential, big temp swing

A cool 46°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temps will climb significantly to 62°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing. Moderate humidity at 77% is worth noting for effort level, especially in later miles.

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Pace Calculator

Distance: 26.2mi
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Race Plan

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True Effort pacing, weather-adjusted mile splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.

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Race Info

The Treherne Marathon, known as "the toughest race on the prairies," challenges runners with its hilly terrain through Manitoba's picturesque Tiger Hills. This Boston Qualifier event offers multiple distances, including a full marathon, half marathon, 10K, 5K, and 1 mile, all starting and finishing in the welcoming town of Treherne. Organized by dedicated local volunteers, the race supports community initiatives, fostering a strong sense of camaraderie and local pride.

Race weekend

Sunday, September 20
9:00 AMMarathon (26.2 mi)
Half Marathon (13.1 mi)
10K (6.2 mi)
5K (3.1 mi)
1 Mile (1.0 mi)

FAQ

When is the 2026 Treherne Marathon?

The 2026 Treherne Marathon will be held on Sunday September 20, 2026.

Is the Treherne Marathon a Boston Marathon Qualifier?

Yes, the Treherne Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2026 Treherne Marathon?

The forecast calls for a high of 62°F and a low of 42°F with a 0% chance of rain.

Historical Weather

Based on 18 years of data
Avg Temp
61°F
L:53° H:67°
RunScore
6
Conditions
Rain Freq
33%
6 of 18 yrs
Wind10mph
Dew47°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-day
56°/72°-
5
2024
partly-cloudy-day
48°/66°-
8
2023
rain
60°/62°Light
6
2022
clear-day
52°/63°-
8
2019
rain
39°/41°Light
8
2018
partly-cloudy-day
33°/40°-
9
2016
rain
58°/78°Light
5
2015
partly-cloudy-day
64°/89°-
4
2014
clear-day
58°/77°-
5
2013
cloudy
57°/69°Light
6
2012
partly-cloudy-day
54°/73°-
6
2011
clear-day
66°/81°-
4
2010
clear-day
55°/66°-
6
2009
clear-day
61°/77°-
5
2008
clear-day
48°/59°-
9
2007
clear-day
55°/83°-
6
2006
clear-day
48°/51°Light
8
2005
clear-day
48°/61°Light
9