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Ultra Marathons Found In Ontario in May
View all ↓Ultra Marathons in Ontario in May 2025
findarace.com is Canada's favourite event discovery site. Check out our list of May 2025 Ultra Marathons in Ontario below.
Race Calendar: Ultra Marathons Found In May
Conquer The Canuck
Cambridge, ON
10 May 25
Coach D's Backyard Ultra and Trail Race
Kawartha Lakes, ON
17 May 25
$110.15 - $196.46
Sulphur Springs Trail Race 2025
Hamilton, ON
24 May 25
Free - $838.45
Spin the Lakes
Huntsville, ON
24 May 25
$110.15
Baden Running Races 2025
Baden, ON
25 May 25
Free - $61.07
H+P THIS MAY BE LOOPY ULTRA
Waterloo, ON
31 May 25
Free
Showing 1-6 of 6 results