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Ontario, Canada · Half Marathon

Half Marathons in Ontario, Canada

Ontario, Canada currently has 13 upcoming half marathons with a confirmed date listed in RaceRove. Mississauga, Burlington, Fergus and Georgina have the largest concentration of events.

June (4), April (2) and October (2) are the busiest months on the calendar right now. Another 10 annual half marathons are waiting for next year's date to be announced.

Search Ontario half marathons
Upcoming, date confirmed
13
Active listings
23
Cities with races
21

More ways to browse Ontario, Canada

Upcoming half marathons in Ontario, Canada

All 13 with a confirmed date, soonest first.

  • Hamilton Marathon Road2Hope
    Hamilton, ON
    MIZUNO Elite 5K1K Kids Run5K Walk/Run10K Walk/Run +6 more
  • The Frostbite Solstice Trail Race
    Mount Hope, ON
    Full Solstice (8:58)Full Solstice Relay (8:58)Half Solstice (4:29)Quarter Solstice (2:15)
  • Polar Bear Run
    Fergus, ON
    Polar Bear 10K Trail RunPolar Bear 5k Trail RunHalf Marathon Winter Trail Run
  • Chilly Half Marathon
    Burlington, ON
    2027 In-Person Chilly Half Marathon
  • Beneva Mississauga Marathon
    Mississauga, ON
    Beneva Mississauga MarathonElectrolit Half MarathonMississauga 10KMississauga 5K Run/Walk +2 more
  • Georgina Spring Fling
    Georgina, ON
    Spring Fling MarathonSpring Fling Half MarathonSpring Fling 10km run/walkSpring Fling 5km run/walk
  • Pelee Island Winery Half Marathon
    Pelee Island, ON
    Pelee Island Winery Half Marathon
  • XACT Kawartha Sun Run
    Kawartha Lakes, ON
    Kawartha Sun Run Half MarathonKawartha Sun Run 10kmKawartha Sun Run 5km
  • The Whole Enchilada
    Uxbridge, ON
    The Full EnchiladaThe Half EnchiladaThe Mini EnchiladaThe Hike Enchilada +2 more
  • Community Strong Race Weekend
    Sault Ste. Marie, ON
    BP 61KM ChallengeKids Fun RunColour Run10 Km +2 more
  • Oakville 21.1
    Oakville, ON
    Half Marathon10km5km
  • TCS Toronto Waterfront Marathon
    Toronto, ON
    GuideIn-Person MarathonIn-Person Half MarathonIn-Person 5K +9 more
  • Seawater Stride 2030 Hosted by LGD
    Mississauga, ON
    5K10KHalf MarathonMarathon +3 more

Dates come from each race's own listing. Always confirm on the organiser's site before you book travel.

Filter these half marathons in the interactive search

When half marathons happen in Ontario, Canada

January
1 upcoming race
February
1 upcoming race
April
2 upcoming races
May
1 upcoming race
June
4 upcoming races
October
2 upcoming races
November
1 upcoming race
December
1 upcoming race

Ontario cities with the most half marathons

Mississauga
2 upcoming races
Burlington
1 upcoming race
Fergus
1 upcoming race
Georgina
1 upcoming race
Hamilton
1 upcoming race
Kawartha Lakes
1 upcoming race
Mount Hope
1 upcoming race
Oakville
1 upcoming race

Annual events awaiting their next date

These half marathons are held every year, but the next date isn't in the listing yet. The month shown is when each is usually held.

  • The County Marathon
    Prince Edward, ON Usually held in October · next date not announced
    Half Marathon2-5 Person Marathon Relay Team5K RunFull Marathon +1 more ~1,600 runners
  • 9runrun - Ottawa
    Ottawa, ON Usually held in October · next date not announced
    5K Adult5K Youth10K Adult10K Youth +6 more
  • Lighthouse to Lighthouse Half Marathon & 5K
    Kincardine, ON Usually held in October · next date not announced
    5KHalf Marathon
  • Long Sault Trail Race & Ultra
    Bowmanville, ON Usually held in October · next date not announced
    Deer 6 Hour Race8AM/Morning Rabbit 7K Run/Hike2PM/Afternoon 7K Rabbit RunRacoon 14K Run +2 more
  • Niagara Falls 10k, Half & Marathon
    Niagara Falls, ON Usually held in October · next date not announced
    Niagara Falls Marathon - October 25Half-Marathon - October 2510K - October 25
  • PHM Run for the Residents
    Markham, ON Usually held in October · next date not announced
    Run for the Residents - Half-MarathonRun for the Residents - 6km Loop
  • Race Around the Place
    Carleton Place, ON Usually held in October · next date not announced
    5k10kHalf Marathon
  • Run The Caves
    Warsaw, ON Usually held in October · next date not announced
    5 km Walk/Run1 km Kids Run10 km Walk/Run25 km Half-Ultra +3 more
  • Thornbury Turkey Trot
    Thornbury, ON Usually held in October · next date not announced
    21K10K5K5K Youth (16 & Under) +1 more
  • U.S. & International Registrants, Niagara Falls 10k, Half & Marathon
    Niagara Falls, ON Usually held in October · next date not announced
    Niagara Falls MarathonHalf-Marathon10K

Half Marathons in nearby provinces and territories

Guides from the RaceRove blog

Half Marathons in Ontario, Canada: common questions

How many half marathons are there in Ontario, Canada?
RaceRove currently lists 13 upcoming half marathons in Ontario, Canada with a confirmed date, plus 10 annual events whose next date hasn't been announced yet.
How long is a half marathon?
A half marathon is 13.1 miles (21.1 kilometres).
Which Ontario cities have the most half marathons?
By upcoming events listed in RaceRove: Mississauga (2), Burlington (1), Fergus (1), Georgina (1) and Hamilton (1).
When is half marathon season in Ontario, Canada?
Of the upcoming half marathons listed, the busiest months are June (4), April (2) and October (2).
What is the biggest half marathon in Ontario, Canada?
By estimated field size, the largest event with a half marathon listed in Ontario, Canada is the The County Marathon, with about 1,600 runners across all of its distances.

Search every half marathon in Ontario, Canada

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