| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-300H | 1 | 38.46 | Wrzesinski, Cleet (2017) (Ennis, MT) | Top 10 Meet(MT), 2015-04-21(#1) |
| B-300H | 2 | 38.72 | Trollope, Taylor (2015) (Skyview, MT) | MT Class AA State Meet(MT), 2015-05-23(#1) |
| B-300H | 3 | 39.28 | Davis, Nolan (2015) (Helena, MT) | MT Class AA State Meet(MT), 2015-05-23(#2) |
| B-300H | 4 | 39.32 | Barrows, Josh (2015) (Helena, MT) | MT AA Western Divisional(MT), 2015-05-15(#1) |
| B-300H | 5 | 39.37 | Neth, Caleb (2016) (Manhattan, MT) | MT Class B State Meet(MT), 2015-05-23(#1) |
| B-300H | 6 | 39.43 | Casey, Jadin (2015) (Stevensville, MT) | MT Class A Championships(MT), 2015-05-23(#1) |
| B-300H | 7 | 39.55 | Pendergast, Daniel (2015) (Stevensville, MT) | Top 10 Meet(MT), 2015-04-21(#2) |
| B-300H | 8 | 39.67 | Neth, Caleb (Manhattan Christian, MT) | Top 10 Midland Roundtable(MT), 2015-04-28(#1) |
| B-300H | 9 | 40.28 | Grinwis, Jacob (2017) (Belgrade, MT) | MT Class A Championships(MT), 2015-05-23(#3) |
| B-300H | 10 | 40.30 | Haugrose, Koltin (2016) (Belt, MT) | MT Class C State Meet(MT), 2015-05-23(#2) |
| B-300H | 11 | 40.34 | Barta, Riley (2015) (Skyview, MT) | MT Class AA State Meet(MT), 2015-05-23(#3) |
| B-300H | 12 | 40.37 | Andersen, Troy (2017) (Beaverhead Co, MT) | MT Class A Championships(MT), 2015-05-23(#4) |
| B-300H | 13 | 40.50 | Dean, Clay (2015) (Butte, MT) | MT Class AA State Meet(MT), 2015-05-23(#4) |
| B-300H | 14 | 40.64 | Grove, Keaton (2015) (Whitefish, MT) | MT Northwestern A Divisional(MT), 2015-05-16(#1) |
| B-300H | 15 | 40.71 | Green, Bryce (2015) (Broadwater, MT) | MT Class B State Meet(MT), 2015-05-23(#2) |
| B-300H | 16 | 40.79 | Hermanson, Jamison (2016) (Great Falls, MT) | MT Class AA State Meet(MT), 2015-05-23(#5) |
| B-300H | 17 | 40.87 | Hunthausen, Will (2016) (Capital, MT) | MT Class AA State Meet(MT), 2015-05-23(#6) |
| B-300H | 18 | 40.93 | Dowdy, Connor (2016) (Capital, MT) | MT AA Western Divisional(MT), 2015-05-15(#3) |
| B-300H | 19 | 40.96 | Collins, Haiden (2017) (Fergus, MT) | Top 10 Midland Roundtable(MT), 2015-04-28(#3) |
| B-300H | 20 | 40.97 | Melice, Xavier (2018) (Capital, MT) | MT AA Western Divisional(MT), 2015-05-15(#4) |
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| | | See more performances for B-300H | | |
