| Q | IHSA Boys 2A Qualifying | 40.43 | 2A Qualifying | 
| Lane | Athlete | Team | Seed | Note | 
|---|---|---|---|---|
| 4 | SLAYTER, Andy | Rockford (Boylan Catholic | 51.78 | |
| 5 | DEBABNEH, Daniel | Arlington Heights (St. Vi | 52.96 | 
| Lane | Athlete | Team | Seed | Note | 
|---|---|---|---|---|
| 1 | BAULING, Alex | Rockford (Boylan Catholic | 49.66 | |
| 2 | FIASCONE, Max | Mundelein (Carmel) | 49.14 | |
| 3 | OZARTUN, JR, Sevan | Belvidere (H.S.) | 47.82 | |
| 4 | PENA, Elijah | Woodstock (North) | 45.28 | |
| 5 | ACOSTA, Mauro | Johnsburg | 45.73 | |
| 6 | SPEAR, Liam | Woodstock (H.S.) | 48.95 | |
| 8 | SILVER, David | Arlington Heights (St. Vi | 50.67 | 
| Lane | Athlete | Team | Seed | Note | 
|---|---|---|---|---|
| 1 | KELLY, Patrick F. | Woodstock (Marian) | 44.14 | |
| 2 | KUCHARSKI, Justin | Woodstock (H.S.) | 42.89 | |
| 3 | MOHRDIECK, Nick | Vernon Hills | 42.15 | |
| 4 | SCHIRMER, Finnigan | Marengo | 39.96 | |
| 5 | BORHART, Blaine | Marengo | 40.29 | |
| 6 | GROVER, Joe | Woodstock (North) | 42.31 | |
| 7 | KIEFFER, Elijaha | North Chicago | 43.64 | |
| 8 | CASTILLO, Carlos | Harvard | 44.33 |