<Tr> <Th> Notable characters </Th> <Td> Marty McFly Emmett Brown Biff Tannen </Td> </Tr> <Tr> <Th> First appearance </Th> <Td> Back to the Future (1985) </Td> </Tr> <P> Hill Valley is the fictional town in California as shown with the clock that serves as the setting of the Back to the Future trilogy and its animated spin - off series . In the trilogy, Hill Valley is seen in four different time periods (1885, 1955, 1985 and 2015) as well as in a dystopian alternate 1985 . The films contain many sight gags, verbal innuendos and detailed set design elements, from which a detailed and consistent history of the area can be derived . </P> <P> The name "Hill Valley" is a joke, being an oxymoron . However, an early script for Back to the Future Part II mentioned that Hill Valley was named after its founder, William "Bill" Hill . </P>

Where is hill valley in back to the future