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Ultramarathons in Ontario, Canada

2026 and 2027 race calendar. 1 upcoming, updated daily.

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Toronto3Ottawa2Burlington1Hamilton1Huntsville1London1Mississauga1Niagara Falls1Paris1Sault Ste. Marie1Sudbury1Thedford1
All 12 cities and towns
Toronto3Ottawa2Burlington1Hamilton1Huntsville1London1Mississauga1Niagara Falls1Paris1Sault Ste. Marie1Sudbury1Thedford1
1 upcoming
Sport
AllRunning10Cycling2Triathlon2Obstacle1
Distance
Any5K1010K8Half marathon9Marathon7Ultra170.31140.61Gravel1
June 2027
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