Register as an alumni from Los Osos High School (Ontario California) and reunite with 1,106 classmates and old friends. Share your memories by posting photos or stories, or find out about your next class reunion!
Class Yearbooks
Grizzlies Football
Varsity Football Schedule 2026-27
08/19 vs JW North
08/26 vs Citrus Valley
09/02 vs Charter Oak
09/09 vs South Hills
09/17 vs Sultana
10/01 vs Chino
10/08 vs Alta Loma
10/15 vs Claremont
10/22 vs Diamond Ranch
10/29 vs San Dimas
08/26 vs Citrus Valley
09/02 vs Charter Oak
09/09 vs South Hills
09/17 vs Sultana
10/01 vs Chino
10/08 vs Alta Loma
10/15 vs Claremont
10/22 vs Diamond Ranch
10/29 vs San Dimas
Recently Joined Grizzlies
Gina Angelo
Class of 2005
Class of 2005
Andrea Ayala
Class of 2007
Class of 2007
Stephen Vallejo
Class of 2007
Class of 2007
Jennifer Beavers
Class of 2005
Class of 2005
Cristina Pacheco
Class of 2008
Class of 2008
George Sorros
Class of 2016
Class of 2016
Marycarmen Barba
Class of 2016
Class of 2016
Brendon House
Class of 2019
Class of 2019
Jennifer Throgmorton
Class of 2004
Class of 2004
Crystal Shallan
Class of 2009
Class of 2009
Austin Austin Chavez
Class of 2025
Class of 2025
Jeremiah Sercado
Class of 2024
Class of 2024
Los Osos Yearbooks
Flip through class yearbooks or browse photo albums from classmates, and see what they look like now:
Los Osos Apparel
Check out our huge selection of Grizzlies spiritwear, including shirts, shorts, accessories and much more!
Grizzlies PRIDE
Los Osos High School Apparel