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Marathon Races in Ontario

Browse 13 upcoming 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 marathon start line.

upcoming races
13
next race · 2026
Oct 3
distances
5
2026 Hamilton Marathon Road2Hope2026 Hamilton Marathon Road2HopeOct 31

Ontario race calendar

October 2026

October 2026: 8 races

  1. OCT03Sat, Oct 32026 Muskoka MarathonBracebridge, ONRoad · 5K / 10K +2
  2. OCT04Sun, Oct 4The County Marathon 2026Prince Edward County, ONRoad · 42.2K / 21.1K +1
  3. OCT09Fri, Oct 9The Maple Leaf March — La Marche Maple Leaf 2026Ottawa, ONRoad · 5K / 10K +2
  4. OCT10Sat, Oct 10Ottawa Fall Colours Run 2026Ottawa, ONRoad · 1K / 3K +4
  5. OCT17Sat, Oct 17TCS Toronto Waterfront Marathon 2026Toronto, ONRoad · Half Marathon / 5K +1
  6. OCT25Sun, Oct 252026 Niagara Falls 10k, Half & MarathonNiagara Falls, ONRoad · 10K / Half Marathon +1
  7. OCT25Sun, Oct 252026 U.S. & International Registrants, Niagara Falls 10k, Half & MarathonNiagara Falls, ONRoad · 10K / Marathon +1
  8. OCT31Sat, Oct 312026 Hamilton Marathon Road2HopeHamilton, ONRoad · 5K / Marathon +3

More race types in Ontario