What kind of snake is this?

My friend and I were at the creek and I almost ran over a snake with a longboard . I live in the inland of California by the Bay Area and the creek is pretty dry because its summer and there is a decent amour of water. The snake was black and white stripes. It was fat and about 3 to 4 feet long . It was just calm . What snake could this be ? I am just wondering . Could it be a California Kingsnake?