| Event | Rank | Mark | By | Meet |
| B-300H | 1 | 36.56 | Lucas, Isaiah (2016) (Cypress Falls, TX) (US#5) | Texas Relays(TX), 2015-03-28(#2) |
| B-300H | 2 | 36.74 | Richmond, Caleb (2015) (Cy-Fair, TX) (US#10) | TX 6A Area 17-18 Cypress(TX), 2015-04-23(#2) |
| B-300H | 3 | 37.83 | Guillory, Tyler (2016) (Cypress Falls, TX) (US#84) | TX 6A District 17 Cypress(TX), 2015-04-15(#3) |
| B-300H | 4 | 37.88 | Izu, Ilolo (2015) (Strake Jesuit, TX) (US#90) | TX 6A District 19 Cinco Ranch(TX), 2015-04-17(#1) |
| B-300H | 5 | 38.01 | Marshall, Sean (2017) (Cypress Ranch , TX) | TX 6A Area 17-18 Cypress(TX), 2015-04-23(#3) |
| B-300H | 6 | 38.34 | Gaskin, Andre (2015) (Clear Lake, TX) | TX 6A Region 3 Houston(TX), 2015-05-02(#4) |
| | | National Elites above. State Elites below | | |
| B-300H | 7 | 38.72 | Martin, Zach (2018) (Travis, TX) | TX 6A District 23 Alief(TX), 2015-04-17(#1) |
| B-300H | 8 | 39.13 | Johnson, Jordan (2016) (Cypress Woods, TX) | TX 6A District 17 Cypress(TX), 2015-04-15(#5) |
| B-300H | 9 | 39.16 | Mcdaniel, Brandon (2015) (Aldine Davis, TX) | Texas Southern Relays(TX), 2015-03-21(#2) |
| B-300H | 10 | 39.23 | Brown, Derrick (2017) (Aldine Davis, TX) | TX 6A Area 17-18 Cypress(TX), 2015-04-23(#4) |
| B-300H | 11 | 39.31 | Guillory, Carl (2016) (North Shore, TX) | TX 6A Area 21-22 North Shore(TX), 2015-04-23(#1) |
| B-300H | 12 | 39.50 | Chambers-Mcdaniel, Brandon (2015) (Aldine Davis, TX) | Aldine Donaldson Relays(TX), 2015-03-06(#2) |
| B-300H | 13 | 39.57 | Ghansash, Lawrence (2015) (Cypress Springs, TX) | Rice Victor Lopez Classic(TX), 2015-04-04(#6) |
| B-300H | 14 | 39.59 | Heinrich, Conrad (2015) (Clements, TX) | Clear Springs Relays(TX), 2015-04-02(#4) |
| B-300H | 15 | 39.81 | Hill, Holten (2015) (Lamar, TX) | Houston Dave Bethany Relays(TX), 2015-03-14(#1) |
| B-300H | 16 | 39.82 | Marion, Branndon (2016) (Cypress Ranch , TX) | TX 6A District 17 Cypress(TX), 2015-04-15(#7) |
| B-300H | 17 | 39.83 | Blanson, John (2015) (North Shore, TX) | TX 6A Region 3 Houston(TX), 2015-05-02(#7) |
| B-300H | 18 | 39.89 | Davis, Collin (2016) (Clear Lake, TX) | TX 6A Area 23-24 Ft Bend(TX), 2015-04-24(#3) |
| B-300H | 18 | 39.89 | Crockett, Cameron (2017) (Cinco Ranch, TX) | Rice Victor Lopez Classic(TX), 2015-04-04(#8) |
| B-300H | 20 | 39.90 | Batista, Keith (2015) (Langham Creek, TX) | Cy-Fair ISD Relays(TX), 2015-03-20(#8) |
| B-300H | 21 | 39.91 | Cravin, Cameron (2016) (Cypress Woods, TX) | TX 6A District 17 Cypress(TX), 2015-04-15(#8) |
| B-300H | 22 | 39.97 | Blades, JR (2016) (Katy, TX) | TX 6A District 19 Cinco Ranch(TX), 2015-04-17(#2) |
| B-300H | 23 | 40.06 | Mpeye, Elliott-Zion (Seven Lakes, TX) | Walter Heintschel Relays(TX), 2015-02-28(#2) |
| B-300H | 24 | 40.08 | Jones, Will (2017) (Cypress Ranch , TX) | TX 6A District 17 Cypress(TX), 2015-04-15(#9) |
| B-300H | 25 | 40.22 | Sawyer, Peyton (2018) (Clear Springs, TX) | TX 6A Area 23-24 Ft Bend(TX), 2015-04-24(#4) |
| B-300H | 26 | 40.23 | Kieth, Batista (Langham Creek, TX) | Humble Sam Mosely Relays(TX), 2015-02-28(#2) |
| B-300H | 27 | 40.28 | Harris, London (2017) (Manvel, TX) | TX 6A Area 21-22 North Shore(TX), 2015-04-23(#3) |
| B-300H | 28 | 40.34 | Simon, Blair (2017) (Hightower, TX) | TX 6A District 23 Alief(TX), 2015-04-17(#3) |
| B-300H | 29 | 40.44 | Bodine-Preston, Casey (2015) (Alvin, TX) | TX 6A Area 21-22 North Shore(TX), 2015-04-23(#4) |
| B-300H | 30 | 40.50 | Stiner, Donovan (2017) (Bellaire, TX) | Alief T.H.E. Relays(TX), 2015-04-02(#4) |
| B-300H | 31 | 40.52 | To, Tyler (2015) (Seven Lakes, TX) | TX 6A Area 19-20 Houston(TX), 2015-04-23(#3) |
| B-300H | 32 | 40.59 | Greene, Christian (2016) (Dawson, TX) | TX 6A Area 21-22 North Shore(TX), 2015-04-23(#5) |
| B-300H | 33 | 40.71 | Johnson, Donovan (2017) (Clear Creek, TX) | TX 6A Area 23-24 Ft Bend(TX), 2015-04-24(#5) |
| B-300H | 33 | 40.71 | Campbell, Davion (2016) (Mayde Creek, TX) | CL Hanna Gator Relays(TX), 2015-03-07(#1) |
| B-300H | 35 | 40.73 | Mpeye, Zion (2017) (Seven Lakes, TX) | Rice Victor Lopez Classic(TX), 2015-04-04(#13) |
| B-300H | 36 | 40.76 | Thomas, Drake (2015) (Hastings, TX) | TX 6A Area 23-24 Ft Bend(TX), 2015-04-24(#6) |
| B-300H | 37 | 40.91 | Frye, Adrian (2017) (Eisenhower, TX) | TX 6A Area 17-18 Cypress(TX), 2015-04-23(#5) |
| B-300H | 38 | 40.92 | Calderon, Taka (2015) (Houston Memorial, TX) | TX 6A Area 17-18 Cypress(TX), 2015-04-23(#6) |
| B-300H | 39 | 40.96 | Williams, Vernon (2016) (North Shore, TX) | TX 6A Area 21-22 North Shore(TX), 2015-04-23(#6) |
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