About the event
Join the Tamarack Ottawa Marathon on May 25, 2025, for a spectacular run through the heart of Ottawa. As part of the Tamarack Ottawa Race Weekend, this marathon is organized by Run Ottawa and features a flat, fast course ideal for personal bests. Runners will pass by iconic landmarks such as the Rideau Canal and the Ottawa River, enjoying the vibrant support of tens of thousands of spectators. This prestigious event attracts elite athletes and recreational runners alike, offering a world-class racing experience.
Date:
Sun
May 25
2025
Location:
Distance:
Elevation profile:
Rolling
Website:
LinkElevation gain:
Number of participants:
Find the best training plan for your goals and the distance you’re planning to run:
Stories from Runnas
The Tamarack Ottawa Marathon takes place on May 25, 2025, offering a scenic course through Canada's capital city. Organized by Run Ottawa, this marathon is part of the Tamarack Ottawa Race Weekend, known for being one of two World Athletics Gold Label marathon events in Canada.
If you are an official race organiser with any questions about this page, please get in touch: races@runna.com
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