Semi Finals-Hosted by Riverside Poly High School
Saturday, April 6, 2024 - Colony High School, Ontario, Ca
| Group Name | Perform | Staging | Warm Up Time |
| Valley Center Middle School | 1:00 PM | 12:55 PM | 11:55 AM |
| California High School Indoor | 1:08 PM | 1:03 PM | 12:03 PM |
| Riverside Poly High School Indoor | 1:17 PM | 1:12 PM | 12:12 PM |
| La Habra High School Indoor Percussion | 1:26 PM | 1:21 PM | 12:21 PM |
| Jurupa Hills Indoor | 1:35 PM | 1:30 PM | 12:30 PM |
| BREAK | 1:44 PM | ||
| Group Name | Perform | Staging | Warm Up Time |
| Redlands High School Indoor Percussion | 1:55 PM | 1:50 PM | 12:50 PM |
| Newport Harbor High School Indoor Percussion | 2:04 PM | 1:59 PM | 12:59 PM |
| John W. North Indoor Percussion | 2:13 PM | 2:08 PM | 1:08 PM |
| Valley Center High School | 2:22 PM | 2:17 PM | 1:17 PM |
| Murrieta Valley High School Winter Percussion Ensemble | 2:31 PM | 2:26 PM | 1:26 PM |
| LUNCH | 2:40 PM | ||
| Group Name | Perform | Staging | Warm Up Time |
| Katella High School Percussion | 4:00 PM | 3:55 PM | 2:55 PM |
| Ontario High School Indoor | 4:09 PM | 4:04 PM | 3:04 PM |
| Bolsa Grande Winter Drum Line | 4:18 PM | 4:13 PM | 3:13 PM |
| A.B. Miller High School Winter Percussion | 4:27 PM | 4:22 PM | 3:22 PM |
| Summit High School Indoor | 4:36 PM | 4:31 PM | 3:31 PM |
| REV Wildcat Percussion Ensemble | 4:45 PM | 4:40 PM | 3:40 PM |
| BREAK | 4:54 PM | ||
| Group Name | Perform | Staging | Warm Up Time |
| San Marino High School Indoor Percussion | 5:10 PM | 5:05 PM | 4:05 PM |
| Citrus Hill Indoor Percussion | 5:19 PM | 5:14 PM | 4:14 PM |
| Santa Fe High School Indoor | 5:27 PM | 5:22 PM | 4:22 PM |
| Colony High School Indoor | 5:35 PM | 5:30 PM | 4:30 PM |
| AWARDS | 5:50 PM | ||