0004
Marathons Found In Ontario in October
View all ↓Marathons in Ontario in October 2025
findarace.com is Canada's favourite event discovery site. Check out our list of October 2025 Marathons in Ontario below.
Race Calendar: Marathons Found In October
2025 Muskoka Marathon
Bracebridge, ON
05 Oct 25
$24.02 - $143.84
2025 TCS Toronto Waterfront Marathon
Toronto, ON
18 Oct 25
$65.40 - $234.53
Niagara Falls 5k, 10k, Half & Marathon 2025
Niagara Falls, ON
26 Oct 25
U.S. & International Registrants, Niagara Falls 5k, 10k, Half & Marathon 2025
Niagara Falls, ON
26 Oct 25
Showing 1-4 of 4 results