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 If you spot anything outdated or incorrect, let us know.
I run 613today on my own and I'm not affiliated with this event or its organizer. Event info may not be perfectly up to date. Please double-check with the official website before heading out, or contact the organizer directly for any questions about the event. If you spot anything wrong on this page, let me know.
Event Details
Upcoming Events
sportsJun 6Open Doors - Heritage Tours
George Street Plaza
Step back in time and explore the rich history of the ByWard Market District! Join our Market Ambassadors for guided tours of heritage landmark sites throughout the District and learn about its fas...
sportsJun 6Ottawa Redblacks Home Opener vs Edmonton Elks
TD Place Stadium
The 2026 CFL season kicks off at TD Place with the Redblacks' first Saturday night home opener since 2021, marking a new era under Coach Ryan Dinwiddie.
sportsJul 11HOPE Volleyball SummerFest 2026
Mooney's Bay Park and Beach
The world's largest one-day volleyball tournament returns to Mooney's Bay with thousands of players, live concerts, food vendors, and summer fun — all supporting local charities.
sportsJun 2BLACKJACKS vs. BANDITS
The Arena at TD Place
West Coast flavor comes to the Capital. The Vancouver Bandits arrive for a fast-paced midweek clash. Don't miss your chance to see some of the league's most explosive scorers go head-to-head.
sportsJun 4BLACKJACKS vs. SEA BEARS
The Arena at TD Place
The Sea Bears swim into Ottawa for a Thursday night tilt. Winnipeg always brings a tough squad, making this a critical early-season test you won't want to miss.
sportsJun 6REDBLACKS vs Edmonton Elks
The Stadium at TD Place
Want to add your event to 613today? It’s free!
Contact Us→