Does anyone know if there is a way for me to find out which universities in California are offering upper division biology related courses in the summer?

Is there a way that I could generally find out which cal state, UCs, or private schools in California are offering upper division biology courses for the summer? I tried asking my department chair for suggestions but he personally doesn’t know too many campuses that does offer them.

Should I try contacting the main headquarters for more information? (Other wise I would probably have to resort to going through each campus alphabetically by university system until I find one!)