| Event | Rank | Mark | By | Meet |
| B-300H | 1 | 37.56 | Stringari, Trenton (2015) (Canon City, CO) (US#55) | Colorado Springs Metro League Championships(CO), 2015-05-07(#1) |
| B-300H | 2 | 37.62 | Sisneros, Triston (2015) (Grandview, CO) (US#60) | Cherry Creek/Grandview Invitational(CO), 2015-05-02(#1) |
| B-300H | 3 | 37.84 | Carrasco, Dominique (2015) (Smoky Hill, CO) (US#88) | CO 5A State Meet(CO), 2015-05-16(#2) |
| B-300H | 4 | 38.34 | Wright, Joshua (2015) (Overland, CO) | CO 5A State Meet(CO), 2015-05-16(#4) |
| B-300H | 5 | 38.36 | Penrose, Johnathan (2016) (Broomfield, CO) | Front Range League Championships(CO), 2015-05-02(#1) |
| B-300H | 6 | 38.39 | Weller, Kaden (2015) (Glenwood Springs, CO) | Dakota Ridge Invitational(CO), 2015-04-18(#1) |
| | | National Elites above. State Elites below | | |
| B-300H | 7 | 38.45 | Hahn, Jacob (2016) (Fruita Monument, CO) | CO 5A State Meet(CO), 2015-05-16(#3) |
| B-300H | 8 | 38.47 | Miller, Alex (2016) (The Classical Academy, CO) | CO 4A State Meet(CO), 2015-05-16(#2) |
| B-300H | 9 | 38.52 | Lienemann, Austin (2015) (Arapahoe, CO) | Cherry Creek/Grandview Invitational(CO), 2015-05-02(#2) |
| B-300H | 10 | 38.65 | Wingard, Andrew (2015) (Ralston Valley, CO) | CO 5A State Meet(CO), 2015-05-16(#7) |
| B-300H | 11 | 38.89 | Ethridge, Dustin (2015) (D'Evelyn, CO) | CO 4A State Meet(CO), 2015-05-16(#3) |
| B-300H | 12 | 39.00 | Gish, Nathan (2015) (Poudre, CO) | CO 5A State Meet(CO), 2015-05-16(#4) |
| B-300H | 13 | 39.14 | Younggreen, Ryan (2015) (Holy Family, CO) | CO 4A State Meet(CO), 2015-05-16(#3) |
| B-300H | 14 | 39.27 | Rodgers, Jordan (2015) (Cherokee Trail, CO) | CO 5A State Meet(CO), 2015-05-16(#8) |
| B-300H | 15 | 39.29 | Hopfe, Sam (2015) (Woodland Park, CO) | CO 4A State Meet(CO), 2015-05-16(#4) |
| B-300H | 16 | 39.42 | Heredia, Angel (2018) (Hinkley, CO) | CO 5A State Meet(CO), 2015-05-16(#10) |
| B-300H | 17 | 39.53 | Johnson, Olabisi (2015) (Bear Creek, CO) | JeffCo 5A League Championships(CO), 2015-05-09(#1) |
| B-300H | 18 | 39.65 | Saling, Joseph (2015) (Vista Ridge, CO) | CO 4A State Meet(CO), 2015-05-16(#7) |
| B-300H | 19 | 39.67 | Vigil, Damacio (2016) (Pueblo County, CO) | CO 4A State Meet(CO), 2015-05-16(#8) |
| B-300H | 20 | 39.68 | Eggleston, Cooper (2016) (Buena Vista, CO) | CO 3A State Meet(CO), 2015-05-16(#1) |
| B-300H | 21 | 39.74 | Hitchcock, Ethan (2015) (Longmont, CO) | CO 4A State Meet(CO), 2015-05-16(#6) |
| B-300H | 22 | 39.76 | Wissell, Brennan (2015) (Grand Junction, CO) | Longmont Invitational(CO), 2015-03-28(#2) |
| B-300H | 23 | 39.81 | Rudel, Jake (2016) (Fort Collins, CO) | Liberty Bell Invitational(CO), 2015-04-25(#4) |
| B-300H | 24 | 39.90 | Gordley, Luke (2017) (Mountain View, CO) | CO 4A State Meet(CO), 2015-05-16(#9) |
| B-300H | 25 | 39.93 | Prejean, Tyler (2016) (Rampart, CO) | Valor Christian Invitational(CO), 2015-03-14(#1) |
| B-300H | 26 | 40.01 | Currie, Sergio (Fountain-Fort Carson, CO) | Pomona Invitational(CO), 2015-04-11(#5) |
| B-300H | 27 | 40.02 | Sullivan, Elijah (2016) (Longmont, CO) | CO 4A State Meet(CO), 2015-05-16(#10) |
| B-300H | 28 | 40.09 | Shuman, Jay (2016) (Palisade, CO) | Liberty Bell Invitational(CO), 2015-04-25(#5) |
| B-300H | 29 | 40.10 | Kembel, Nolan (2017) (Mountain View, CO) | Legend Track Classic(CO), 2015-04-04(#1) |
| B-300H | 30 | 40.12 | Couture, Jonah (2015) (Columbine, CO) | JeffCo 5A League Championships(CO), 2015-05-09(#2) |
| B-300H | 31 | 40.13 | Tagita, Jakeob (2015) (Columbine, CO) | CO 5A State Meet(CO), 2015-05-16(#11) |
| B-300H | 32 | 40.14 | Needham, Jon (2015) (Alamosa, CO) | CO 3A State Meet(CO), 2015-05-16(#2) |
| B-300H | 33 | 40.32 | Roberts, Gallian (2017) (Salida, CO) | CO 3A State Meet(CO), 2015-05-16(#3) |
| B-300H | 34 | 40.36 | Wall, Tanner (2016) (Thompson Valley, CO) | CO 4A State Meet(CO), 2015-05-16(#11) |
| B-300H | 35 | 40.39 | Gilbertson, Max (2016) (Thornton, CO) | CO 5A State Meet(CO), 2015-05-16(#14) |
| B-300H | 36 | 40.55 | Ill, Dalton (2016) (Broomfield, CO) | Front Range League Championships(CO), 2015-05-02(#4) |
| B-300H | 37 | 40.59 | Mccoy, Aaron (2017) (Canon City, CO) | Colorado Springs Metro League Championships(CO), 2015-05-07(#4) |
| B-300H | 37 | 40.59 | Miller, Matthew (2015) (Florence, CO) | CO 3A State Meet(CO), 2015-05-16(#3) |
| B-300H | 39 | 40.67 | Leman, Justin (Douglas, CO) | Pomona Invitational(CO), 2015-04-11(#6) |
| B-300H | 40 | 40.77 | Gates, Shane (2016) (Cedaredge, CO) | CO 2A State Meet(CO), 2015-05-16(#1) |
| B-300H | 41 | 40.80 | Warren, Josh (2015) (Thunderridge, CO) | Mountain Range Mustang Invitational(CO), 2015-04-04(#3) |
| B-300H | 41 | 40.80 | Campos, Will (2016) (The Classical Academy, CO) | CO 4A State Meet(CO), 2015-05-16(#13) |
| B-300H | 43 | 40.90 | Brannen, Jared (2017) (Fossil Ridge, CO) | Broomfield Shootout(CO), 2015-03-27(#5) |
| B-300H | 43 | 40.90 | Maxum, Kyle (Cherry Creek, CO) | Cherry Creek/Grandview Invitational(CO), 2015-05-02(#5) |
| B-300H | 45 | 40.94 | Rosenstrauch, Bailey (2016) (Palmer Ridge, CO) | St. Vrain Invitational(CO), 2015-05-08(#1) |
| B-300H | 46 | 40.95 | Walker, Josh (2016) (Longmont, CO) | Boulder County Championships(CO), 2015-04-21(#4) |
| B-300H | 46 | 40.95 | Whelan, Tavish (2015) (Prairie View, CO) | CO 5A State Meet(CO), 2015-05-16(#16) |
| B-300H | 48 | 40.96 | Dynes, Zeke (2015) (Highlands Ranch, CO) | Liberty Bell Invitational(CO), 2015-04-25(#8) |
| B-300H | 48 | 40.96 | Starman, Chase (2017) (Strasburg, CO) | CO 3A State Meet(CO), 2015-05-16(#4) |
| B-300H | 50 | 40.98 | Christiansen, Zach (2015) (Lyons, CO) | CO 2A State Meet(CO), 2015-05-16(#2) |
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| | | See more performances for B-300H | | |
