50 Mile / 100K Races in Ontario

Browse 1 upcoming 50 mile / 100k races in Ontario, with dates, locations, and event details for each listing. Also explore 5K, Road, 10K, 1K, and Trail races in Ontario, or compare options to find your next 50 mile / 100k start line.

upcoming race: 1
next race · 2027: May 29
distances: 5

Ontario race calendar

May 2027

MAY29Sat, May 29
100 MI
Sulphur Springs Trail Race 2027Ancaster, ONTrail · 100K / 100 Mile +4Trail · 100K / 100 Mile +4

More race types in Ontario

Distances and race types