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ExploreFind your next start lineBrowse upcoming Canadian races by place, distance, and terrain.

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RacesOntario43K Races in Ontario

43K Races in Ontario

Upcoming1raceNext upSep 19, 2026ThroughSep 2026

Browse 1 upcoming 43k races in Ontario, with dates, venues, distances, and registration details for each listing. Also explore 5K, Road, 10K, 1K, and Trail races in Ontario, or compare options to find your next 43k start line.

Distances

10K (1) · 30K (1) · 43K (1)

Types

Upcoming Featured Races in Ontario

Monster of Mazinaw Trail Race 2026

43K Races in Ontario 2026

September 2026

Monster of Mazinaw Trail Race 2026

More race types in Ontario

122 races

5K

102 races

Road

59 races

10K

58 races

1K

49 races

Trail