Half marathons in Ontario
Half marathons across Ontario: 35 with a confirmed date (39 more are waiting on a date). Toronto, Hamilton and Ottawa have the most. Next up: Big Little Run 2026 on September 27, 2026.
Updated daily — every listing links to the organizer's official registration page.
When
74 races listed
- Sunday, September 27, 2026
Big Little Run 2026
Guelph, ON · Road running · 5km / 10km / 21km · from 45
- Sunday, September 27, 2026
Railway City Road Races 2026 Live Run
St Thomas, ON · Road running · 5km / 10km / 21km / 1km · from 29
- Sunday, September 27, 2026
Run4Health 2026
Walkerton, ON · Road running · 1km / 5km / 10km / 21km · from 62
- Sunday, September 27, 2026
Run for the Grapes Half Marathon & 5K
Lincoln, ON · Road running · 5km / 21km · from 68
- Sunday, September 27, 2026
Springbank Road Races LondonReg closes soon
London, ON · Road running · 21km / 5km / 250m / 2km · from 11
- Sunday, September 27, 2026
Great Rift Community Half MarathonReg closes soon
Hamilton, ON · Road running · 5km / 21km · from 67
- Date to be announced
ELEVATE, Blue Mountain - Trail Elevation ChallengeDate TBA
Grey County, ON · Trail · 5km / 10km / 1km / 2km
- Sunday, September 27, 2026
Albion Ascent Trail Race
Hamilton, ON · Trail · 21km / 10km / 5km
- Saturday, October 3, 2026
PHM Run for the Residents
Markham, ON · Road running · 21km / 6km
- Sunday, October 4, 2026
Oakville 21.1Reg closes soon
Oakville, ON · Road running · 21km / 10km / 5km · from 70
New races in Ontario, once a month
Newly listed races, and the registrations closing in the next three weeks. One email a month, one click to leave.
- Sunday, October 4, 2026
The County Marathon 2026Reg closes soonPrice rises soon
Prince Edward, ON · Road running · 21km / 42km / 5km / 1km · from 72
- Sunday, October 4, 2026
Lighthouse to Lighthouse Half Marathon & 5KReg closes soon
Kincardine, ON · Road running · 5km / 21km · from 51
- Saturday, October 10, 2026
Thornbury Turkey Trot 2026
Thornbury, ON · Road running · 21km / 10km / 5km / 1km · from 72
- Sunday, October 11, 2026
The Maple Leaf March -- La Marche Maple Leaf
Ottawa, ON · Walk · 5km / 10km / 21km / 42km · from 40
- Saturday, October 17, 2026
Long Sault Trail Race & Ultra
Bowmanville, ON · Trail · 7km / 14km / 21km / 2km · from 95
- Saturday, October 17, 2026
9runrun - Ottawa
Ottawa, ON · Road running · 5km / 10km / 2km / 21km · from 30
- Saturday, October 17, 2026
Nottawasaga Fall Classic 2026
Wasaga Beach, ON · Road running · 10km / 20km · from 45
- Sunday, October 18, 2026
2026 TCS Toronto Waterfront Marathon
Toronto, ON · Road running · 5km / 42km / 21km / 1km
- Sunday, October 18, 2026
The Wawa Trifecta
Wawa, ON · Trail · 6km / 1km / 22km · from 15
- Saturday, October 24, 2026
Race Around the PlaceReg closes soon
Carleton Place, ON · Road running · 5km / 10km / 21km · from 53
- Sunday, October 25, 2026
Niagara Falls 10k, Half & Marathon 2026Reg closes soon
Niagara Falls, ON · Road running · 42km / 21km / 10km · from 107
- Sunday, October 25, 2026
Niagara Falls International Marathon
Niagara Falls, ON · Road running · 10km / 5km
- Date to be announced
5 Peaks Cider RunDate TBA
Uxbridge, ON · Road running · 21km / 3km / 1km
- Date to be announced
Niagara Falls 5k, 10k, Half & MarathonDate TBA
Niagara Falls, ON · Road running · 42km / 21km / 10km / 5km
- Sunday, November 1, 2026
2026 Hamilton Marathon Road2Hope
Hamilton, ON · Road running · 5km / 1km / 10km / 21km · from 66
- Friday, November 27, 2026
Nemo Memorial Run - Run for the Heroes.
Toronto, ON · Road running · 5km / 10km / 21km / 42km · from 29
- Date to be announced
The Golden Spike Trail RaceDate TBA
Milton, ON · Trail · 5km / 10km / 21km
- Thursday, December 31, 2026
Run to End Homelessness
Toronto, ON · Road running · 1mi / 5km / 10km / 21km · from 29
- Thursday, December 31, 2026
Run to End Child Hunger
Toronto, ON · Road running · 1mi / 5km / 10km / 21km · from 40
- Saturday, January 30, 2027
Polar Bear Run - 2027
Fergus, ON · Trail · 10km / 5km / 21km · from 45
- Sunday, February 28, 2027
2027 Chilly Half Marathon
Burlington, ON · Road running · 21km · from 95
- Date to be announced
Trekking for HomeDate TBA
London, ON · Road running · 5km / 10km / 21km
- Date to be announced
April Run to PortDate TBA
St Thomas, ON · Road running · 21km / 17km / 15km / 12km
- Sunday, April 25, 2027
2027 Beneva Mississauga Marathon
Mississauga, ON · Road running · 42km / 21km / 10km / 5km
- Date to be announced
St Lawrence MarathonDate TBA
Cornwall, ON · Road running · 42km / 21km / 10km / 5km
- Date to be announced
Merrickville Heritage ClassicDate TBA
Merrickville, ON · Road running · 2km / 5km / 10km / 21km
- Sunday, May 2, 2027
Georgina Spring Fling 2027BQ
Georgina, ON · Road running · 42km / 21km / 10km / 5km · from 76
- Date to be announced
Toronto MarathonDate TBA
Toronto, ON · Road running · 42km / 21km / 10km / 5km
- Date to be announced
SudburyROCKSDate TBA
Sudbury, ON · Road running · 42km / 21km / 10km / 5km
- Saturday, May 29, 2027
Tamarack Ottawa Race Weekend
Ottawa, ON · Road running · 42.2km / 21.1km / 10km / 5km
Half marathons in Ontario — FAQ
- How many half marathons are there in Ontario in 2026?
- Half marathons listed for Ontario right now: 35 with a confirmed date, plus 39 that ran last season and haven't announced their next one. The list refreshes nightly as organizers announce new dates.
- What is the next half marathon in Ontario?
- Big Little Run 2026 in Guelph on September 27, 2026.
- Which Ontario cities host the most half marathons?
- Toronto (4), Hamilton (3), Ottawa (3).