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Races in September 2026 in Ontario

126 races with a confirmed date in September 2026 across Ontario — the biggest group is 5K races (76). The busiest day is Sunday, September 27, 2026 with 23 races. Every listing links to the organizer's official registration page.

October →September across Canada

The big ones in September

Multi-distance race weekends — the ones worth planning around.

What September is made of

5K races · 7610K races · 29Half marathons · 12Ultramarathons · 4Marathons · 2

Where they are

Toronto · 16London · 10Windsor · 7Hamilton · 6Ottawa · 6Guelph · 4Barrie · 3Milton · 3Mississauga · 3Aylmer · 2Brampton · 2Kingston · 2

Every race in September

126 races listed

Other months

October 2026November 2026December 2026January 2027February 2027

Races in September 2026 — FAQ

How many races are there in September 2026 in Ontario?
126 with a confirmed date, and the biggest group is 5K races with 76. The busiest single day is Sunday, September 27, 2026, with 23 races. Recompiled nightly from the organizers' own calendars, so the number moves as races are announced.
When should I register for a September race?
Most Canadian races take entries until race week — what expires first is the price tier, not the spot. Check the fee window on the race's page before you wait.
Do I sign up here?
No. Every listing links straight to the organizer's own registration page. RaceFinder never takes signups or a cut.

Planning further out? Build a season, see when race season peaks in Canada, or check which entry fees go up next.