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Races in December 2026 in Ontario

17 races with a confirmed date in December 2026 across Ontario — the biggest group is 5K races (9). The busiest day is Saturday, December 5, 2026 with 8 races. Every listing links to the organizer's official registration page.

← NovemberDecember across Canada

The big ones in December

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

What December is made of

5K races · 910K races · 3Half marathons · 1Marathons · 1

Where they are

Toronto · 4Guelph · 2Hamilton · 2Barrie · 1Greater Sudbury · 1London · 1Mount Hope · 1Niagara-on-the-Lake · 1Orangeville · 1Ottawa · 1Pembroke · 1Whitby · 1

Every race in December

17 races listed

Other months

September 2026October 2026November 2026January 2027February 2027

Races in December 2026 — FAQ

How many races are there in December 2026 in Ontario?
17 with a confirmed date, and the biggest group is 5K races with 9. The busiest single day is Saturday, December 5, 2026, with 8 races. Recompiled nightly from the organizers' own calendars, so the number moves as races are announced.
When should I register for a December 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.