The 2025 event has concluded.

Ottawa Marathon

Ottawa, ON, Canada • May 25, 2025
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rain Partly cloudy throughout the day with rain.

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The Tartan Ottawa International Marathon is Canada’s fastest marathon. This race attracts thousands of participants, including a world-class contingent of pro-athletes every year. The Tartan Ottawa International Marathon is a World Athletics Elite Label Race and one of Canada’s largest Boston Qualifiers. Source

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When is the 2025 Ottawa Marathon?

The 2025 Ottawa Marathon will be held on Sunday May 25, 2025.

Is the Ottawa Marathon a Boston Marathon Qualfier?

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

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Historical Weather & Results

RunScore
Run Score: 7
Temp
70°F
Min/Max
56°/70°F
Dew
49°F
Days of Rain
4/18
Wind
9mph
Tap a row for details.
YearLow / HighRain

Ottawa Marathon 2024 Weather History

Partly cloudy throughout the day with early morning rain.

2024
partly-cloudy-day
58°/ 67°-
Run Score: 8

Ottawa Marathon 2023 Weather History

Clear conditions throughout the day.

2023
clear-day
59°/ 81°-
Run Score: 8

Ottawa Marathon 2022 Weather History

Partly cloudy throughout the day with rain clearing later.

2022
rain
58°/ 67°Light
Run Score: 8

Ottawa Marathon 2019 Weather History

Partly cloudy throughout the day with early morning rain.

2019
clear-day
62°/ 70°-
Run Score: 7

Ottawa Marathon 2018 Weather History

Partly cloudy throughout the day with early morning rain.

2018
partly-cloudy-day
57°/ 69°-
Run Score: 8

Ottawa Marathon 2017 Weather History

Partly cloudy throughout the day.

2017
partly-cloudy-day
57°/ 75°-
Run Score: 8

Ottawa Marathon 2016 Weather History

Partly cloudy throughout the day with rain.

2016
cloudy
64°/ 82°-
Run Score: 8

Ottawa Marathon 2015 Weather History

Partly cloudy throughout the day.

2015
partly-cloudy-day
53°/ 80°-
Run Score: 8

Ottawa Marathon 2014 Weather History

Partly cloudy throughout the day.

2014
partly-cloudy-day
52°/ 75°-
Run Score: 8

Ottawa Marathon 2013 Weather History

Partly cloudy throughout the day.

2013
partly-cloudy-day
47°/ 60°-
Run Score: 8

Ottawa Marathon 2012 Weather History

Partly cloudy throughout the day.

2012
partly-cloudy-day
57°/ 72°-
Run Score: 9

Ottawa Marathon 2011 Weather History

Cloudy skies throughout the day with rain in the morning and afternoon.

2011
cloudy
61°/ 68°Light
Run Score: 8

Ottawa Marathon 2010 Weather History

Cloudy skies throughout the day with early morning rain.

2010
cloudy
61°/ 66°-
Run Score: 9

Ottawa Marathon 2009 Weather History

Partly cloudy throughout the day with morning rain.

2009
partly-cloudy-day
57°/ 69°Light
Run Score: 8

Ottawa Marathon 2008 Weather History

Partly cloudy throughout the day.

2008
partly-cloudy-day
50°/ 71°-
Run Score: 9

Ottawa Marathon 2007 Weather History

Cloudy skies throughout the day with rain.

2007
cloudy
52°/ 54°Light
Run Score: 8

Ottawa Marathon 2005 Weather History

Cloudy skies throughout the day with late afternoon rain.

2005
partly-cloudy-day
53°/ 68°-
Run Score: 8

Ottawa Marathon 2004 Weather History

Clear conditions throughout the day.

2004
clear-day
45°/ 65°-
Run Score: 8
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR