Ottawa Marathon

Location: Ottawa
Country: Canada
Website: https://www.runottawa.ca/
2025 Marathon Date: 24/05/2025
2026 Marathon Date: 24/05/2026
Winning Time 2025: 02:08:22
% Sub-3s: 5–10%
# Sub-3s: 100–499
Total Runners: 3k–10k

The Ottawa Marathon is one of Canada’s most established spring marathons, attracting thousands of participants each year to the nation’s capital. Held in late May, the Ottawa Race Weekend Marathon features a fast, scenic course that weaves through two provinces and offers ideal conditions for sub-3 runners.

Starting in downtown Ottawa, the route crosses into Gatineau, Quebec, before returning to Ontario via the Alexandria and Portage bridges. From there, it follows the Rideau Canal and several of the city’s broad parkways. The course is well-designed for rhythm running, with few turns and long, straight stretches that suit even pacing. Terrain is flat throughout, with little variation to break momentum.

May in Ottawa usually brings cool mornings, often between 8–12°C, with low humidity and minimal wind. These conditions, paired with the early start time, contribute to the marathon’s reputation as a PB-friendly event. Rain is occasionally a factor, but rarely heavy enough to disrupt performance.

Crowd support is strongest in central Ottawa, especially along Elgin Street, Bank Street and near Lansdowne Park. Elsewhere, spectators are scattered but consistent, and the event is known for its volunteer enthusiasm and seamless organisation. Aid stations are frequent and efficiently staffed.

For sub-3 runners, the Ottawa Marathon provides a strong pacing environment. The event attracts a substantial number of competitive amateurs, ensuring company throughout the race. While it may not have the global profile of Boston or London, the Ottawa Marathon remains one of the most dependable and performance-friendly marathons in North America. It’s an excellent choice for runners seeking a fast, well-organised race in a welcoming city with an experienced team behind it.