<Li> Central Valley (North) <Ul> <Li> Sacramento Valley <Ul> <Li> Chico Area </Li> <Li> Greater Sacramento </Li> <Li> Yuba - Sutter Area <Ul> <Li> Sutter Buttes </Li> </Ul> </Li> </Ul> </Li> <Li> Sacramento - San Joaquin River Delta </Li> <Li> San Joaquin Valley (North) <Ul> <Li> Metropolitan Fresno </Li> <Li> Merced Area </Li> <Li> Modesto Area </Li> <Li> Stockton Area </Li> </Ul> </Li> </Ul> </Li> <Ul> <Li> Sacramento Valley <Ul> <Li> Chico Area </Li> <Li> Greater Sacramento </Li> <Li> Yuba - Sutter Area <Ul> <Li> Sutter Buttes </Li> </Ul> </Li> </Ul> </Li> <Li> Sacramento - San Joaquin River Delta </Li> <Li> San Joaquin Valley (North) <Ul> <Li> Metropolitan Fresno </Li> <Li> Merced Area </Li> <Li> Modesto Area </Li> <Li> Stockton Area </Li> </Ul> </Li> </Ul> <Li> Sacramento Valley <Ul> <Li> Chico Area </Li> <Li> Greater Sacramento </Li> <Li> Yuba - Sutter Area <Ul> <Li> Sutter Buttes </Li> </Ul> </Li> </Ul> </Li> <Ul> <Li> Chico Area </Li> <Li> Greater Sacramento </Li> <Li> Yuba - Sutter Area <Ul> <Li> Sutter Buttes </Li> </Ul> </Li> </Ul>

Is sacramento located in a valley or in a mountainous region