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Ultra Marathons Found In Ontario in October
View all ↓Ultra Marathons in Ontario in October 2025
findarace.com is Canada's favourite event discovery site. Check out our list of October 2025 Ultra Marathons in Ontario below.
Race Calendar: Ultra Marathons Found In October
BLUE BULLY ULTRA
Blue Mountains, ON
03 Oct 25
$30.00 - $389.00
Manotick Backyard Ultra
Ottawa, ON
04 Oct 25
$24.03 - $89.39
9th Annual UMEI Lightning Bolt
Essex County, ON
04 Oct 25
$29.23 - $169.49
Run The Caves
Peterborough, ON
05 Oct 25
$13.04 - $100.28
TMMC Fall 5 KM Classic
Cambridge, ON
05 Oct 25
Free - $62.15
Sticks n' Stones Trail Race 2025
Hamilton, ON
11 Oct 25
$73.05 - $274.57
Wise Raven Trail Race
Waterloo, ON
18 Oct 25
$50.81 - $239.63
Phoenix Trail Races
London, ON
18 Oct 25
$85.76
The Bad Thing 2025
Auburn, ON
25 Oct 25
Showing 1-9 of 9 results