About
Tamarack Ottawa Race Weekend is Canada's largest running festival, attracting close to 47,000 participants annually across multiple race distances. The 2026 edition features a newly redesigned ultra-flat, ultra-fast course perfect for personal bests and Boston qualifiers.
Race Weekend Schedule
Saturday, May 23, 2026:
- Kids Marathon
- Ottawa 2K presented by ASICS Runkeeper
- Ottawa 5K presented by ASICS Runkeeper
Sunday, May 24, 2026:
- Ottawa 10K presented by Otto's Ottawa (7:00 AM)
- Ottawa Half Marathon presented by Desjardins (7:00 AM)
- Tamarack Homes Ottawa International Marathon (7:00 AM)
Course Highlights
The newly redesigned course offers an ultra-flat profile through downtown Ottawa, making it ideal for:
- Chasing personal records
- Securing Boston Marathon qualifiers
- First-time marathoners
- Scenic city running
Important Notes
- Marathon Status: The 2026 Tamarack Homes Ottawa International Marathon is SOLD OUT
- Other race distances may still have availability
- Start location: Ottawa City Hall, 110 Laurier Avenue W
About the Event
Ottawa Race Weekend has established itself as one of Canada's premier running events, combining competitive racing with a festive atmosphere in the heart of the nation's capital.
Information may change. If you spot anything outdated or incorrect, let us know.
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Event Details
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