42.2K
Tartan Ottawa International Marathon
Sun, May 25 · 5:00 AM
$210.28
- Past race
- Road
Tamarack Ottawa Race Weekend 2025
- Ottawa, Ontario
Hosted byRun Ottawa
About Tamarack Ottawa Race Weekend 2025
The Tamarack Ottawa Race Weekend is Canada’s largest running festival held annually in May in Ottawa, Ontario. Established in 1975, it features multiple races attracting both elite athletes and recreational runners from around the world, including the Boston Marathon qualifying Tartan Ottawa International Marathon.
Participants enjoy scenic courses passing landmarks such as Parliament Hill and the Rideau Canal, with comprehensive on-course support including periodic water, nutrition, and misting stations, medical services, and lively cheer zones. The Green Bib option offers runners a chance to fundraise for the Desjardins Charity Challenge instead of receiving a medal.
Distances and events
21.1K
Ottawa Half Marathon presented by Desjardins
Sun, May 25 · 7:00 AM
$142.31
10K
Ottawa 10K presented by Otto's Ottawa
Sat, May 24 · 4:30 PM
$112.50
5K
Ottawa 5K
Sat, May 24 · 2:00 PM
$61.88
2K
Ottawa 2K
Sat, May 24 · 1:00 PM
1.2K
Ottawa Kids Marathon
Kids OnlySat, May 24 · 12:00 PM
$31.50
Prices from the organizer. Please check the official website for up-to-date times and pricing.
Highlights
Scenic routes passing Parliament Hill and the Rideau Canal
Kilometer markers throughout the course
Water and Xact Nutrition stations approximately every 3 km
Cooling and misting stations available
Portable toilets at every water station
Cheering and entertainment stations
Full medical services on route and at finish line
Green Bib option supports the Desjardins Charity Challenge
Stroller allowed only in the Ottawa 2K event
Course
- Surface
- Road
- Location
- Ottawa, Ontario
Course details
- Road surface throughout
- Boston Marathon qualifying marathon
- Elite Label Road Race designation by World Athletics
- Support stations with water, nutrition, and medical aid
- Misting and cooling stations along the route
- Portable toilets at every aid station
- Courses feature iconic Ottawa landmarks
About the organizer
Organizer
Run Ottawa
More races like this
Listing freshness
The Running Directory combines organizer-provided details, official race links, and ongoing listing research. Always confirm final dates, prices, times, and course details with the race organizer before registering.
Last updated: October 2, 2026
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