California High School serves grades 9 through 12 in the San Ramon Valley Unified School District. It has a Great Schools rating of 9 out of 10 and is a National Blue Ribbon school. The average class size is 28 students with an overall enrollment of more than 2,000 students. The high school offers advanced-learning courses, as well as school sports and activities. It is undergoing major construction (with Measure A funding) to appropriately serve its rapidly growing student population.