Castro Valley High School is located in the unincorporated suburban community of Castro Valley, California, United States. It is a high school for grades 9 to 12. Named a National Exemplary School in 1984–85 and 1988–89, it was a California Distinguished School in 1987–88, 2000–01, and 2009.It is part of the Castro Valley Unified School District. Source: Wikipedia (en)