Valley Vision defines the Sacramento region as six contiguous counties, including El Dorado, Placer, Sacramento, Sutter, Yolo, and Yuba. The six-county region covers more than 6,500 square miles and includes urban as well as remote rural areas. From the deep-water channel of the Port of Sacramento, the terrain extends into the high country of the Sierra Nevada mountains. Sacramento, Sutter, Yolo, and Yuba counties occupy the central portion of California's Central Valley. El Dorado and Placer counties cross through the foothills and into the Sierra Nevada mountains. The largest city in the region, Sacramento, is located at the confluence of the American and Sacramento rivers in Sacramento County.