| Event | Rank | Mark | By | Meet |
| B-300H | 1 | 37.82 | Ifianayi, Paul (2015) (Elk Grove, IL) (US#82) | IL 3A Boys State Finals(IL), 2015-05-30(#2) |
| | | National Elites above. State Elites below | | |
| B-300H | 2 | 38.43 | Jackson, Jaden (2018) (Fremd, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#1) |
| B-300H | 3 | 39.75 | Almodovar, Joel (2015) (Conant, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#2) |
| B-300H | 4 | 40.02 | Ifianayi, Peter (2015) (Elk Grove, IL) | IL 3A Boys State Prelims(IL), 2015-05-29(#13) |
| B-300H | 5 | 40.62 | Fekete, Rob (2015) (Palatine, IL) | Palatine Relays(IL), 2015-05-02(#3) |
| B-300H | 6 | 40.71 | Montesinos, Steven (2015) (Wheeling, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#3) |
| B-300H | 7 | 40.83 | Konopka, Ben (2018) (Fremd, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#3) |
| B-300H | 8 | 41.51 | Garcia, Dan (2016) (Palatine, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#4) |
| B-300H | 9 | 41.77 | Balanganayi, Mackenzie (2017) (Palatine, IL) | MSL-West Boys Divisional Championship(IL), 2015-04-28(#5) |
| B-300H | 10 | 41.95 | Urban, Tyler (2015) (Wheeling, IL) | Mid-Suburban League Boys Championships(IL), 2015-05-15(#8) |
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| | | See more performances for B-300H | | |
