400m U17 Men, Heat:2 of 2 ; Official result since 11:55
CBP 49.66 Joseph Dowling
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 5 | 563 | CARTHY Ciaran | Dundrum South Dublin A.C. | 53.05 | Q | |||
| 2 | 3 | 371 | HICKEY Jack | Moyne A.C. | 55.11 | Q | |||
| 3 | 7 | 566 | RAFTERY Jack | Donore Harriers | 55.14 | Q | |||
| 4 | 8 | 711 | O'CONNOR John | Greystones & District A.C. | 55.21 | q | |||
| 5 | 2 | 600 | ELWOOD Kevin | Brothers Pearse A.C. | 55.61 | q | |||
| 6 | 6 | 712 | WALKDEN Nic | United Striders A.C. | 55.90 | ||||
| 7 | 4 | 68 | KEARNS Christopher | Finn Valley A.C. | 56.13 |