Tamarack Ottawa Race Weekend is Canada’s largest and most inclusive running festival, offering a range of distances for all ages and levels. Held across two days in May, the event draws over 35,000 participants annually, with races set against the scenic backdrop of Canada’s capital city. The marathon and half marathon courses are flat and fast, certified by World Athletics and recognized as ideal Boston qualifiers. The weekend also includes Canada’s 10K Championship and a bustling atmosphere filled with music, cheering crowds, and a charity challenge supporting over 80 organizations. From elite athletes to first-time runners and families, the event is a celebration of fitness, community, and Canadian spirit.
Races
Marathon
Half Marathon
10 km
5 km
Race Date:
24 May, 2026
On Sunday, May 24, 2026, the Tartan Ottawa International Marathon, organized by Run Ottawa, is Canada's largest marathon, starting and finishing at Ottawa City Hall, offering a flat, fast course through the nation's capital and serving as a Boston Marathon qualifier.
Weather based on historical averages.
FAQs
What is the Tartan Ottawa International Marathon?
How long is the Tartan Ottawa International Marathon?
Where does the Tartan Ottawa International Marathon take place?
What is the elevation gain of the Tartan Ottawa International Marathon?
How can I prepare for the Tartan Ottawa International Marathon?
How do I choose the right training plan for the Tartan Ottawa International Marathon?
On Sunday, May 24, 2026, the Tartan Ottawa International Marathon, organized by Run Ottawa, is Canada's largest marathon, starting and finishing at Ottawa City Hall, offering a flat, fast course through the nation's capital and serving as a Boston Marathon qualifier.
The Tartan Ottawa International Marathon is 42km long.
The Tartan Ottawa International Marathon takes place in Ottawa, ON, Canada.
Runna classifies the Tartan Ottawa International Marathon elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Tartan Ottawa International Marathon?
On Sunday, May 24, 2026, the Tartan Ottawa International Marathon, organized by Run Ottawa, is Canada's largest marathon, starting and finishing at Ottawa City Hall, offering a flat, fast course through the nation's capital and serving as a Boston Marathon qualifier.
How long is the Tartan Ottawa International Marathon?
The Tartan Ottawa International Marathon is 42km long.
Where does the Tartan Ottawa International Marathon take place?
The Tartan Ottawa International Marathon takes place in Ottawa, ON, Canada.
What is the elevation gain of the Tartan Ottawa International Marathon?
Runna classifies the Tartan Ottawa International Marathon elevation profile as Flat.
How can I prepare for the Tartan Ottawa International Marathon?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Tartan Ottawa International Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Major City
Kid friendly
