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5K races in Ontario

5K races across Ontario: 188 with a confirmed date (237 more are waiting on a date). Toronto, Hamilton and Ottawa have the most. Next up: Harvest Hustle on September 26, 2026.

Updated daily — every listing links to the organizer's official registration page.

10K racesHalf marathonsMarathonsUltramarathonsTrail racesObstacle races (OCR)

When

425 races listed

New races in Ontario, once a month

Newly listed races, and the registrations closing in the next three weeks. One email a month, one click to leave.

5K races in Ontario — FAQ

How many 5K races are there in Ontario in 2026?
5K races listed for Ontario right now: 188 with a confirmed date, plus 237 that ran last season and haven't announced their next one. The list refreshes nightly as organizers announce new dates.
What is the next 5K race in Ontario?
Harvest Hustle in Guelph on September 26, 2026.
Which Ontario cities host the most 5K races?
Toronto (21), Hamilton (18), Ottawa (12).