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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
$103.68 - $119.83
2026 TCS Toronto Waterfront Marathon
Toronto, ON
Sat 17 Oct 26
2026 Women's Training Program
Toronto, ON
Sun 18 Oct 26
Free
Niagara Falls 10k, Half & Marathon 2026
Niagara Falls, ON
Sun 25 Oct 26
$106.85 - $172.21
U.S. & International Registrants, Niagara Falls 10k, Half & Marathon 2026
Niagara Falls, ON
Sun 25 Oct 26
$90.52 - $155.88
2026 Hamilton Marathon Road2Hope
Hamilton, ON
Sat 31 Oct 26
$1.00 - $10.00
Showing 1-6 of 6 results