what is considered the valley in northern california?
Subregions and their counties commonly associated with the valley include: North Sacramento Valley (all or parts of Shasta, Tehama, Glenn, Butte, Colusa) Sacramento Metro (all or parts of Sacramento, El Dorado, Solano, Sutter, Yuba, Yolo, Placer) North San Joaquin (all or parts of San Joaquin, Stanislaus, Merced)