Half Marathon Races in Ontario
Browse 24 upcoming half marathon races in Ontario, with dates, locations, and event details for each listing. Also explore 5K, Road, 10K, 1K, and Trail races in Ontario, or compare options to find your next half marathon start line.
- upcoming races
- 24
- next race · 2026
- Oct 3
- distances
- 5
Ontario race calendar
October 2026
October 2026: 15 races
- OCT03Sat, Oct 32026 Muskoka MarathonBracebridge, ONRoad · 5K / 10K +2Road · 5K / 10K +2
- OCT03Sat, Oct 32026 PHM Run for the ResidentsMarkham, ONRoad · Half MarathonRoad · Half Marathon
- OCT04Sun, Oct 42026 Lighthouse to Lighthouse Half Marathon & 5KKincardine, ONRoad · Half Marathon / 5KRoad · Half Marathon / 5K
- OCT04Sun, Oct 4Oakville 21.1 2026Oakville, ONRoad · 5K / Half Marathon +1Road · 5K / Half Marathon +1
- OCT04Sun, Oct 4The County Marathon 2026Prince Edward County, ONRoad · 42.2K / 21.1K +1Road · 42.2K / 21.1K +1
- OCT09Fri, Oct 9The Maple Leaf March — La Marche Maple Leaf 2026Ottawa, ONRoad · 5K / 10K +2Road · 5K / 10K +2
- OCT10Sat, Oct 102026 Thornbury Turkey TrotThornbury, ONRoad · 1K / 21K +2Road · 1K / 21K +2
- OCT10Sat, Oct 10Ottawa Fall Colours Run 2026Ottawa, ONRoad · 1K / 3K +4Road · 1K / 3K +4
- OCT17Sat, Oct 172026 9runrun - OttawaOttawa, ONRoad · Half Marathon / 10K +2Road · Half Marathon / 10K +2
- OCT17Sat, Oct 17Long Sault Trail Race & Ultra 2026Bowmanville, ONTrail · Half MarathonTrail · Half Marathon
