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Half Marathons Found In Ontario in October
View all ↓Half Marathons in Ontario in October 2026
findarace.com is Canada's favourite event discovery site. Check out our list of October 2026 Half Marathons in Ontario below.
Race Calendar: Half Marathons Found In October
PHM Run for the Residents
Markham, ON
Sat 03 Oct 26
Lighthouse to Lighthouse Half Marathon & 5K
Kincardine, ON
Sun 04 Oct 26
Oakville 21.1
Oakville, ON
Sun 04 Oct 26
$69.90 - $143.19
9runrun - Ottawa
Ottawa, ON
Sat 17 Oct 26
$24.80 - $126.27
9runrun
Ottawa
Sat 17 Oct 26
$30.44 - $126.27
2026 Women's Training Program
Toronto, ON
Sun 18 Oct 26
Free
Race Around the Place
Carleton Place, ON
Sat 24 Oct 26
$52.99 - $109.36
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
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