| Date | Event | Details | Results | |
|---|---|---|---|---|
| 2023 | ||||
| Jun 25 | Heart Lake Run 5K Brampton road-running | Heart Lake Run 5K Details | ||
| Jun 24 | District F Civic Recreation Complex - Oshawa, ON outdoor | District F Details | Results | |
| Jun 24 - Jun 25 | Ontario Combined Events Championships Toronto Track and Field Centre – Toronto, ON outdoor | Ontario Combined Events Championships Details | Results | |
| Jun 24 - Jun 25 | NXTCHAMP Invitational Toronto Track and Field Centre – Toronto, ON outdoor | NXTCHAMP Invitational Details | Results | |
| Jun 24 | Johnny Loaring Classic Alumni Field - Windsor, ON outdoor | Johnny Loaring Classic Details | Results | |
| Jun 24 | Pride & Remembrance Run Toronto road-running | Pride & Remembrance Run Details | ||
| Jun 24 | Community Strong Festival Sault Ste Marie road-running | Community Strong Festival Details | ||
| Jun 23 - Jun 25 | Ontario Combined Events Championships Toronto Track and Field Centre – Toronto, ON outdoor | Ontario Combined Events Championships Details | Results | |
| Jun 21 | Ottawa Twilight Series 3 Terry Fox Athletic Facility - Ottawa, ON outdoor | Ottawa Twilight Series 3 Details | Results | |
| Jun 21 | Royal City Inferno Track & Field Festival Alumni Stadium - Guelph, ON outdoor | Royal City Inferno Track & Field Festival Details | Results | |
| Jun 20 | YUTC Twilight 2 Toronto Track and Field Centre – Toronto, ON outdoor | YUTC Twilight 2 Details | Results | |
| Jun 18 | District B Ray Lewis Track & Field Complex (Mohawk Park) - Hamilton, ON outdoor | District B Details | Results | |
| Jun 17 | Boomerang Trail Race Batawa road-running | Boomerang Trail Race Details | ||
| Jun 17 | District G Thousand Islands Secondary School - Brockville, ON outdoor | District G Details | Results | |
| Jun 17 | District E St. Theresa's C.H.S. - Midland, ON outdoor | District E Details | Results | |
| Jun 17 | District C Davidson Centre - Kincardine, ON outdoor | District C Details | Results | |
| Jun 17 | District D Toronto Track and Field Centre – Toronto, ON outdoor | District D Details | Results | |
| Jun 17 | Waterloo 10km Classic Road Race, 5km & 3km Waterloo road-running | Waterloo 10km Classic Road Race, 5km & 3km Details | ||
| Jun 17 | Under Armour Toronto 10K Toronto road-running | Under Armour Toronto 10K Details | ||
| Jun 14 | Hamilton Hoka 100m & 1500m Night Mona Campbell Track - Hamilton, ON outdoor | Hamilton Hoka 100m & 1500m Night Details | Results | |
| Jun 14 | Ottawa Twilight Series 2 Terry Fox Athletic Facility - Ottawa, ON outdoor | Ottawa Twilight Series 2 Details | ||
| Jun 11 | John Allen Field Series 1 Strathroy District Collegiate Institute, Strathroy, ON outdoor | John Allen Field Series 1 Details | ||
| Jun 11 | Run the Great Lakes Sault Ste Marie road-running | Run the Great Lakes Details | ||
| Jun 10 | Buttertart Trot Midland road-running | Buttertart Trot Details | ||
| Jun 8 - Jun 10 | OFSAA Championships Terry Fox Athletic Facility - Ottawa, ON outdoor | OFSAA Championships Details | Results | |
| Jun 6 | Kanata Race Day Ottawa road-running | Kanata Race Day Details | ||
| Jun 6 | YUTC Twilight 1 Toronto Track and Field Centre – Toronto, ON outdoor | YUTC Twilight 1 Details | Results | |
| Jun 3 | Fiddle 50 Fiddle Park, Shelburne road-running | Fiddle 50 Details | ||
| Jun 3 | Rotary Huron Shore Run Southampton road-running | Rotary Huron Shore Run Details | ||
| Jun 3 | Great Mansfield Outdoors 2023 Mulmur road-running | Great Mansfield Outdoors 2023 Details | ||
| Jun 2 - Jun 3 | OFSAA West Region Jacob Hespeler SS - Cambridge, ON outdoor | OFSAA West Region Details | Results | |
| Jun 2 | Hamilton Hoka Season Opener Twilight Mona Campbell Track - Hamilton, ON outdoor | Hamilton Hoka Season Opener Twilight Details | Results | |
| Jun 1 - Jun 2 | OFSAA South Region Terry Fox Stadium - Brampton, ON outdoor | OFSAA South Region Details | Results | |
| Jun 1 - Jun 2 | OFSAA East Region Terry Fox Athletic Facility - Ottawa, ON outdoor | OFSAA East Region Details | Results | |
| May 31 - May 1 | OFSAA North Region (NOSSA, NEOAA, NWOSSAA) Various Locations outdoor | OFSAA North Region (NOSSA, NEOAA, NWOSSAA) Details | Results | |
| May 31 - May 1 | OFSAA North Region Laurentian Community Track at Laurentian University - Sudbury, ON outdoor | OFSAA North Region Details | Results | |
| May 31 | Ottawa Twilight Series 1 Terry Fox Athletic Facility - Ottawa, ON outdoor | Ottawa Twilight Series 1 Details | ||
| May 30 | OFSAA South Region outdoor | OFSAA South Region Details | ||
| May 30 | OFSAA North Region outdoor | OFSAA North Region Details | ||
| May 30 | OFSAA East Region outdoor | OFSAA East Region Details | ||
| May 30 - May 1 | OFSAA Central Region Toronto Track and Field Centre – Toronto, ON outdoor | OFSAA Central Region Details | Results | |
| May 30 | UTTC Twilight 1 Varsity Stadium - Toronto, ON outdoor | UTTC Twilight 1 Details | Results | |
| May 28 | Bob Vigars Classic Western Alumni Stadium - London, ON outdoor | Bob Vigars Classic Details | ||
| May 28 | Ontario 10K Race Walk Championships (The Roman Olszewski Racewalks) Hanlan's Point - Toronto, ON outdoor | Ontario 10K Race Walk Championships (The Roman Olszewski Racewalks) Details | Results | |
| May 28 | Bronte Creek 5k and 10k Oakville road-running | Bronte Creek 5k and 10k Details | ||
| May 27 | Tamarack Ottawa Race Weekend Ottawa road-running | Tamarack Ottawa Race Weekend Details | ||
| May 27 | GTA All Comers Track Prep Meet Toronto Track and Field Centre – Toronto, ON outdoor | GTA All Comers Track Prep Meet Details | Results | |
| May 27 | Throwers Club Meet 1 Toronto Track and Field Centre – Toronto, ON outdoor | Throwers Club Meet 1 Details | Results | |
| May 27 | Ontario Para Athletics Championships Toronto Track and Field Centre – Toronto, ON outdoor | Ontario Para Athletics Championships Details | Results | |
| May 27 | Sulphur Springs Trail Races Ancaster road-running | Sulphur Springs Trail Races Details | ||
