Tamarack Homes Ottawa International Marathon 2026

The Tamarack Homes Ottawa International Marathon 2026 takes place on May 24, 2026, as part of the Tamarack Ottawa Race Weekend 2026. Centered at Ottawa City Hall, 110 Laurier Ave W, in Ottawa, Ontario, Canada, this celebrated running festival features multiple road race distances. Participants can expect typical late-May weather in Ottawa, which often includes mild temperatures ranging from 8°C to 18°C, though runners should prepare for potential spring showers. The weekend offers a variety of competitive and recreational opportunities, from elite-level marathons to Canada's largest 5K.

What races are included in the Tamarack Ottawa Race Weekend 2026?

• →Tamarack Homes Ottawa International Marathon (Sunday, May 24, 7:00 AM ET)
• →Ottawa Half Marathon presented by Desjardins (Sunday, May 24, 9:00 AM ET)
• →Ottawa 10K presented by Otto's Ottawa (Saturday, May 23, 6:00 PM ET)
• →Ottawa 5K (Saturday, May 23, 4:00 PM ET)

What are the registration fees for the different distances?

• →Ottawa Half Marathon: $174.38 CAD (incl. fees) + HST
• →Ottawa 10K: $112.50 CAD (incl. fees) + HST
• →Ottawa 5K: $61.88 CAD (incl. fees) + HST

What are the age requirements for participation?

• →Marathon: 18+ years old
• →Half Marathon: 16+ years old
• →10K: 14+ years old
• →5K: 5+ years old

What is the schedule for the Ottawa 10K?

• →Hand cyclists: 5:40 PM ET
• →Elite women: 5:45 PM ET
• →Elite men and other waves: 6:30 PM ET

What is included with race registration?

• →Personalized race bib (first name)
• →Finisher medal (spinning design for Marathon and Half Marathon)
• →Professional race timing
• →On-course Xact Nutrition and Hydration
• →Recovery food
• →2 weeks of free access to the Runna coaching app

What amenities and features are available on the course?

• →Kilometre markers along the entire route
• →Water and Xact hydration stations (lemon Xact + water) every ~3K
• →Xact Nutrition stations at specific intervals (8.5K, 22K, and 32.5K for the Marathon; 15.25K for the Half Marathon)
• →Cooling and misting stations
• →Portable toilets at every water station
• →Cheering and entertainment stations
• →Full medical services on the route and at the finish line

Are there any specific race rules or restrictions?

• →Strollers are NOT permitted in any of the races.
• →The Marathon has a 7-hour race limit and a requirement to reach the 27km marker (Pretoria Bridge area) by 11:30 AM.

What awards are available for the Ottawa 10K?

• →The event serves as the Canadian 10km Age Group (Masters) Championships.
• →Top 3 male and female Canadian residents per 5-year age group (starting 30–34) are awarded Gold, Silver, and Bronze.
• →Participants must be 2026 Athletics Canada members (citizen or permanent resident) to qualify.
• →Results are determined by chip time.

Are there any optional add-ons available?

• →Souvenir race shirt
• →iTab Commemorative Ribbon Hanger
• →Photography and videography packages via Marathon Photos ↗
• →iRun Digital Magazine subscription
• →Charity fundraising opportunities

Is there an environmentally friendly registration option?

• →A Green Bib option is available across all events, allowing participants to redirect part of their registration fee to the Desjardins Charity Challenge fund instead of receiving a medal or mailed amenities.