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.
Race Date:
24 May, 2026
Also on May 24, 2026, the Ottawa Half Marathon, organized by Run Ottawa, begins and ends at Ottawa City Hall, guiding runners through a scenic 21.1 km route along the Rideau Canal and Ottawa River, suitable for both seasoned and novice runners.
Race Date:
23 May, 2026
Scheduled for May 23, 2026, the Ottawa 10K, organized by Run Ottawa, serves as the Canadian 10K Championships, attracting elite runners to a fast, scenic course starting at Ottawa City Hall and featuring views of the Rideau Canal and Dow’s Lake.
Race Date:
23 May, 2026
Taking place on May 23, 2026, the Ottawa 5K, organized by Run Ottawa, starts and ends at Ottawa City Hall, guiding runners past landmarks like Parliament Hill and along the Rideau Canal in a 5 km loop suitable for all levels.
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!
What is the Ottawa Half Marathon?
How long is the Ottawa Half Marathon?
Where does the Ottawa Half Marathon take place?
What is the elevation gain of the Ottawa Half Marathon?
How can I prepare for the Ottawa Half Marathon?
How do I choose the right training plan for the Ottawa Half Marathon?
Also on May 24, 2026, the Ottawa Half Marathon, organized by Run Ottawa, begins and ends at Ottawa City Hall, guiding runners through a scenic 21.1 km route along the Rideau Canal and Ottawa River, suitable for both seasoned and novice runners.
The Ottawa Half Marathon is 21km long.
The Ottawa Half Marathon takes place in Ottawa, ON, Canada.
Runna classifies the Ottawa Half 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 Ottawa Half Marathon?
Also on May 24, 2026, the Ottawa Half Marathon, organized by Run Ottawa, begins and ends at Ottawa City Hall, guiding runners through a scenic 21.1 km route along the Rideau Canal and Ottawa River, suitable for both seasoned and novice runners.
How long is the Ottawa Half Marathon?
The Ottawa Half Marathon is 21km long.
Where does the Ottawa Half Marathon take place?
The Ottawa Half Marathon takes place in Ottawa, ON, Canada.
What is the elevation gain of the Ottawa Half Marathon?
Runna classifies the Ottawa Half Marathon elevation profile as Flat.
How can I prepare for the Ottawa Half 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 Ottawa Half 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!
What is the Ottawa 10K?
How long is the Ottawa 10K?
Where does the Ottawa 10K take place?
What is the elevation gain of the Ottawa 10K?
How can I prepare for the Ottawa 10K?
How do I choose the right training plan for the Ottawa 10K?
Scheduled for May 23, 2026, the Ottawa 10K, organized by Run Ottawa, serves as the Canadian 10K Championships, attracting elite runners to a fast, scenic course starting at Ottawa City Hall and featuring views of the Rideau Canal and Dow’s Lake.
The Ottawa 10K is 10km long.
The Ottawa 10K takes place in Ottawa, ON, Canada.
Runna classifies the Ottawa 10K 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 Ottawa 10K?
Scheduled for May 23, 2026, the Ottawa 10K, organized by Run Ottawa, serves as the Canadian 10K Championships, attracting elite runners to a fast, scenic course starting at Ottawa City Hall and featuring views of the Rideau Canal and Dow’s Lake.
How long is the Ottawa 10K?
The Ottawa 10K is 10km long.
Where does the Ottawa 10K take place?
The Ottawa 10K takes place in Ottawa, ON, Canada.
What is the elevation gain of the Ottawa 10K?
Runna classifies the Ottawa 10K elevation profile as Flat.
How can I prepare for the Ottawa 10K?
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 Ottawa 10K?
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 Ottawa 5K?
How long is the Ottawa 5K?
Where does the Ottawa 5K take place?
What is the elevation gain of the Ottawa 5K?
How can I prepare for the Ottawa 5K?
How do I choose the right training plan for the Ottawa 5K?
Taking place on May 23, 2026, the Ottawa 5K, organized by Run Ottawa, starts and ends at Ottawa City Hall, guiding runners past landmarks like Parliament Hill and along the Rideau Canal in a 5 km loop suitable for all levels.
The Ottawa 5K is 5km long.
The Ottawa 5K takes place in Ottawa, ON, Canada.
Runna classifies the Ottawa 5K 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 Ottawa 5K?
Taking place on May 23, 2026, the Ottawa 5K, organized by Run Ottawa, starts and ends at Ottawa City Hall, guiding runners past landmarks like Parliament Hill and along the Rideau Canal in a 5 km loop suitable for all levels.
How long is the Ottawa 5K?
The Ottawa 5K is 5km long.
Where does the Ottawa 5K take place?
The Ottawa 5K takes place in Ottawa, ON, Canada.
What is the elevation gain of the Ottawa 5K?
Runna classifies the Ottawa 5K elevation profile as Flat.
How can I prepare for the Ottawa 5K?
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 Ottawa 5K?
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
