Pioneer High School - Class of 2004 Alumni, Whittier CA

Join thousands of alumni from Pioneer High School and the Class of 2004. Reconnect with classmates, photos, yearbooks, upcoming reunions.

Varsity Football Schedule 2026-27

08/20 vs Santa Fe
08/27 vs La Quinta
09/03 vs Rancho Alamitos
09/10 vs Kennedy
09/17 vs Estancia
10/01 vs Artesia
10/08 vs Lynwood
10/15 vs Whittier
10/22 vs Firebaugh

Upcoming Class of 2004 Reunions

Browse past reunion events and photos for your class here.

Past Class of 2004 Reunions

Browse past reunion events and photos for your class here.

Pioneer '04 Apparel

Browse our apparel store for a wide range of Titans gear, from t-shirts and hoodies, to caps and accessories.

Class Yearbook

View past yearbooks

Recently joined '04 Classmates

Cynthia Nuno
Class of 2004

Connect with Class of 2004 Classmates

Christina Ramos

Vilma Oliva

Andres Palomo

Nearby Pioneer Classmates

Class of 2002

13 classmates have joined

View Class of 2002 Alumni

Class of 2003

9 classmates have joined

View Class of 2003 Alumni

Class of 2005

8 classmates have joined

View Class of 2005 Alumni

Class of 2006

7 classmates have joined

View Class of 2006 Alumni