| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 47.31 | Ojennes, Caleb (2016) (Palmer Ridge, CO) (US#43) | CO 4A State Meet(CO), 2015-05-16(#1) |
| B-400 | 2 | 47.74 | Waters, Ben (2016) (Valor Christian, CO) (US#72) | CO 4A State Meet(CO), 2015-05-16(#2) |
| B-400 | 3 | 47.93 | Ware, Mike (2015) (Gateway, CO) | CO 5A State Meet(CO), 2015-05-16(#1) |
| B-400 | 4 | 47.97 | McClurkin, Duane (2015) (Fountain-Fort Carson, CO) | Colorado Springs Metro League Championships(CO), 2015-05-07(#1) |
| | | National Elites above. State Elites below | | |
| B-400 | 5 | 48.30 | Miller, Brock (2017) (Lakewood, CO) | CO 5A State Meet(CO), 2015-05-16(#3) |
| B-400 | 6 | 48.45 | Deray, Nick (2015) (The Classical Academy, CO) | CO 4A State Meet(CO), 2015-05-16(#3) |
| B-400 | 7 | 48.51 | Malone, Logan (2015) (Palmer Ridge, CO) | Broomfield Shootout(CO), 2015-03-27(#2) |
| B-400 | 8 | 48.71 | Munson, Calvin (2015) (Fairview, CO) | CO 5A State Meet(CO), 2015-05-16(#4) |
| B-400 | 9 | 48.73 | Ragin, Aaron (2015) (Legacy, CO) | CO 5A State Meet(CO), 2015-05-16(#5) |
| B-400 | 10 | 48.86 | Roche, Preston (2015) (Poudre, CO) | CO 5A State Meet(CO), 2015-05-16(#7) |
| B-400 | 11 | 48.90 | Steiner, Marcus (2015) (Denver South, CO) | CO 4A State Meet(CO), 2015-05-16(#4) |
| B-400 | 12 | 48.97 | Yount, Blake (2015) (Smoky Hill, CO) | CO 5A State Meet(CO), 2015-05-16(#6) |
| B-400 | 13 | 49.00 | Johnson, Eric (2015) (Harrison, CO) | Colorado Springs Metro League Championships(CO), 2015-05-07(#2) |
| B-400 | 14 | 49.14 | Abarca, Sunday (2017) (Aspen, CO) | CO 3A State Meet(CO), 2015-05-16(#1) |
| B-400 | 15 | 49.32 | Finegan, Shane (2017) (Wiggins, CO) | CO 2A State Meet(CO), 2015-05-16(#1) |
| B-400 | 16 | 49.51 | Rockwood, Mark (2017) (Ralston Valley, CO) | CO 5A State Meet(CO), 2015-05-16(#8) |
| B-400 | 17 | 49.64 | Book, Daniel (2015) (Cherry Creek, CO) | Centennial League Championships(CO), 2015-05-09(#2) |
| B-400 | 18 | 49.67 | Ramos, Justice (2015) (Montezuma-Cortez, CO) | CO 4A State Meet(CO), 2015-05-16(#7) |
| B-400 | 19 | 49.69 | Forcatto, Nico (2015) (Fort Collins, CO) | Poudre Invitational(CO), 2015-04-03(#2) |
| B-400 | 20 | 49.70 | Moreno, Said (2015) (Westminster, CO) | CO 5A State Meet(CO), 2015-05-16(#9) |
| B-400 | 21 | 49.71 | Giovagnoli, Gino (2015) (Eagle Valley, CO) | CO 4A State Meet(CO), 2015-05-16(#6) |
| B-400 | 22 | 49.74 | Anderson, Evan (2016) (Resurrection Christian, CO) | CO 2A State Meet(CO), 2015-05-16(#2) |
| B-400 | 23 | 49.76 | Dunn, Jake (2015) (Colorado Springs Christian, CO) | CO 3A State Meet(CO), 2015-05-16(#1) |
| B-400 | 24 | 49.87 | Dinkel, Jacob (2015) (Horizon, CO) | CO 5A State Meet(CO), 2015-05-16(#10) |
| B-400 | 25 | 49.90 | Waters, Mark (2015) (Pikes Peak, CO) | CO 1A State Meet(CO), 2015-05-16(#1) |
| B-400 | 26 | 49.91 | Sabino, Juan (Fountain-Fort Carson, CO) | Colorado Springs Metro League Championships(CO), 2015-05-07(#2) |
| B-400 | 27 | 49.93 | Cody, Jacob (2015) (Pueblo South, CO) | CO 4A State Meet(CO), 2015-05-16(#8) |
| B-400 | 28 | 49.98 | Harris, Kent (2016) (Denver Lutheran, CO) | CO 3A State Meet(CO), 2015-05-16(#3) |
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| | | See more performances for B-400 | | |
