| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 49.16 | Matthews, Connor (2016) (Helena, MT) | MT Class AA State Meet(MT), 2015-05-23(#1) |
| B-400 | 2 | 49.37 | Casey, Jadin (2015) (Stevensville, MT) | MT Class A Championships(MT), 2015-05-23(#1) |
| B-400 | 3 | 49.46 | Neth, Caleb (2016) (Manhattan, MT) | MT Class B State Meet(MT), 2015-05-23(#1) |
| B-400 | 4 | 49.48 | Butcher, Brock (2015) (Fergus, MT) | Top 10 Midland Roundtable(MT), 2015-04-28(#1) |
| B-400 | 5 | 49.49 | Opland, Sean (2016) (Troy, MT) | MT Class B State Meet(MT), 2015-05-23(#2) |
| B-400 | 6 | 49.54 | Daum, Dalton (2015) (Butte, MT) | MT Class AA State Meet(MT), 2015-05-23(#2) |
| B-400 | 7 | 49.88 | Sylvester, Taylor (2015) (Corvallis, MT) | MT Class A Championships(MT), 2015-05-23(#2) |
| B-400 | 8 | 49.94 | Coon, Jeremiah (2015) (Helena, MT) | MT Class AA State Meet(MT), 2015-05-23(#3) |
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| | | See more performances for B-400 | | |
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