| ! | Records-All Classifications | 46.51 | George Washington HS | 2007 | State Track Meet | |
| ! | Records-All Classifications | 46.51 | Denver East HS | 2018 | State Track Meet |
| Lane | Team | Squad | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Seed | Note |
|---|---|---|---|---|---|---|---|---|
| 3 | Steamboat Springs High School | A | Jacobson | Hale | Spitzley | Ward | 58.82 | Verified |
| 4 | Summit High School | B | Davis | Frazier | Johnson | Salazar | 56.00 | Unverified: WSL/SWL Championships |
| 5 | Soroco High School | B | 58.59 | Unverified: |
| Lane | Team | Squad | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Seed | Note |
|---|---|---|---|---|---|---|---|---|
| 1 | Middle Park High School | A | Ludwig | Harris | Dytkiewicz | Petersen | 56.91 | Verified |
| 2 | Clear Creek High School | A | Primus | Inman | Gothman | Cade | 57.35 | Verified |
| 3 | Soroco High School | A | Almeida | Medina | Whaley | Edwards | 54.59 | Verified |
| 4 | Eagle Valley High School | A | Solvedt | Meryhew | Bumgardner | Howe | 52.45 | Verified |
| 5 | Summit High School | A | Heflin | Reed | Wentworth | Brady | 53.89 | Verified |
| 6 | West Grand High School | A | Freitag | Martinson | James | Lechman | 55.81 | Verified |
| 7 | Gilpin County High School | A | Antill | Marr | Osteboe | Ramsey | 56.85 | Verified |