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Marathons Found In Ontario in October
View all ↓Marathons in Ontario in October 2026
findarace.com is Canada's favourite event discovery site. Check out our list of October 2026 Marathons in Ontario below.
Race Calendar: Marathons Found In October
2026 Muskoka Marathon
Bracebridge, ON
Sat 03 Oct 26
$49.81 - $168.28
2026 TCS Toronto Waterfront Marathon
Toronto, ON
Sat 17 Oct 26
$71.03 - $228.89
Niagara Falls 10k, Half & Marathon 2026
Niagara Falls, ON
Sun 25 Oct 26
$57.84 - $139.53
U.S. & International Registrants, Niagara Falls 10k, Half & Marathon 2026
Niagara Falls, ON
Sun 25 Oct 26
$57.84 - $123.20
2026 Hamilton Marathon Road2Hope
Hamilton, ON
Sat 31 Oct 26
$1.00 - $10.00
Showing 1-5 of 5 results