| 1977 | FOOTHILL | 2002 | MONTE VISTA | |
| 1978 | SAN RAMON VALLEY | 2003 | AMADOR VALLEY | |
| 1979 | SAN RAMON VALLEY | 2004 | SAN RAMON VALLEY | |
| 1980 | SAN RAMON VALLEY | 2005 | SAN RAMON VALLEY | |
| 1981 | CALIFORNIA | 2006 | GRANADA | |
| 1982 | AMADOR VALLEY | 2007 | GRANADA | |
| 1983 | SAN RAMON VALLEY | 2008 | LIVERMORE | |
| 1984 | SAN RAMON VALLEY | 2009 | SAN RAMON VALLEY | |
| 1985 | SAN RAMON VALLEY / MONTE VISTA | 2010 | GRANADA | |
| 1986 | CALIFORNIA / GRANADA / FOOTHILL | 2011 | GRANADA |
| 1987 | CALIFORNIA / SAN RAMON VALLEY / GRANADA | 2012 | GRANADA | |
| 1988 | CALIFORNIA / SAN RAMON VALLEY | 2013 | AMADOR VALLEY | |
| 1989 | SAN RAMON VALLEY / MONTE VISTA | 2014 | ||
| 1990 | MONTE VISTA | 2015 | ||
| 1991 | SAN RAMON VALLEY | 2016 | ||
| 1992 | AMADOR VALLEY / SAN RAMON VALLEY | 2017 | ||
| 1993 | AMADOR VALLEY | 2018 | ||
| 1994 | LIVERMORE / GRANADA | 2019 | ||
| 1995 | 2020 | |||
| 1996 | 2021 |
| 1997 | LIVERMORE | 2022 | ||
| 1998 | GRANADA | 2023 | ||
| 1999 | GRANADA | 2024 | ||
| 2000 | SAN RAMON VALLEY | 2025 | ||
| 2001 | 2026 |