Women 300 Meter Hurdles Junior
| Record | Time | Date | Name | |
| Advance: | Top | 2 | Each | Heat plus-- |
| OFSAA: | 42.46 | 1997 | Jessica | Zelinka Sir-- |
| Can | Inter: | 41.66 | 1994 | Nadia Schmiedt-- |
| Sec | Lane | Name | Seed | ||
| 1 | 1 | Makenzie Joseph Smss-Mississauga | 48.23 | ||
| 1 | 2 | Mikaela Burke Hcs-Jordan Stati | 47.19 | ||
| 1 | 3 | Elizabeth Korczak Lepss-Sudbury | 52.14 | ||
| 1 | 4 | Baylie Hiuser Waterloo-Oxford | 48.04 | ||
| 1 | 5 | Chelsea Fowler Georgian Bay | 46.27 | ||
| 1 | 6 | Savannah Baillargeon Sandwich | 46.23 | ||
| 1 | 7 | Abigail Jaremko St. Mary's Colle | 51.09 | ||
| 1 | 8 | Lily-Christiane Phillips Ehs-St. Cath | 47.13 |
| Sec | Lane | Name | Seed | ||
| 2 | 1 | Jennielle Alleyne-Joseph Mother Teresa - | 49.30 | ||
| 2 | 2 | Katie Polischuk Marymount-Sudbur | 53.01 | ||
| 2 | 3 | Ella Steel-Douglas Sandwich | 45.30 | ||
| 2 | 4 | Alessia Ruiu Bishop Ryan | 48.41 | ||
| 2 | 5 | Claire Shambrook Birchmount Park | 47.03 | ||
| 2 | 6 | Sasha Salwonchuk Smcss- Pickering | 47.76 | ||
| 2 | 7 | Madeline Price Brooklin | 47.43 | ||
| 2 | 8 | Sophia Fontenelle Father John Redm | 46.55 |
| Sec | Lane | Name | Seed | ||
| 3 | 1 | Isabella Murphy St. Peter - P | 47.44 | ||
| 3 | 2 | Sydney Freeman Bmlss - Bracebri | 46.97 | ||
| 3 | 3 | Rachel Peck St. Theresa | 47.55 | ||
| 3 | 4 | Maryam Balaa Ashbury | 48.80 | ||
| 3 | 5 | Quinn Coughlin Opeongo | 44.32 | ||
| 3 | 6 | Megane Couture Hearst | 53.35 | ||
| 3 | 7 | Brooklyn Taylor Bmhs - Alliston | 46.99 | ||
| 3 | 8 | Mya Brown Woburn | 48.70 |
