Championship A Class Prelims @ Los Osos HS 03/28/26 Sat | Total Performing Ensembles: 60
- PSA
- Helix CHS
- Katella HS
- South Hills HS
- Alta Loma HS
- La Quinta HS (W)
- Rancho Alamitos HS
- Mira Costa HS
- Glen A. Wilson HS
- North HS
- Temple City HS
- Canyon HS (AH)
- Arcadia HS (PSA)
- Bonita HS
- Trabuco Hills HS
- Orange Vista HS
- Camarillo HS
- Sunny Hills HS
- Woodbridge HS (PSA)
- Lakewood HS
- Bellflower HS
- Chaffey HS (PSA)
- Crescenta Valley HS
- Thousand Oaks HS
- Simi Valley High School Guard and Percussion
- Westminster HS
- Don Lugo HS
- Upland HS
- St. Genevieve HS
- Troy HS
- Cypress HS
- Santa Monica HS
- Patriot HS
- Golden Valley HS
- Burbank HS
- Buena Park HS
- Warren HS
- Del Norte HS (PSA)
- Torrance HS
- Bolsa Grande HS
- Laguna Hills HS
- Monrovia HS
- Vista HS
- La Habra HS
- Temescal Canyon HS
- Scripps Ranch HS
- Aliso Niguel HS
- Valley View HS
- Palisades CHS
- Serrano HS
- Claremont HS
- Grossmont HS
- Westlake HS
- Oak Park HS
- Downey HS