Central ValleyGreat Central Valley, The Valley Topography, major parts and cities of the Central Valley LocationCalifornia, United StatesLong-axis length450 mi (720 km)Width40 to 60 miles (64 to 97 km)Area22,500 square miles (58,000 km2)Depth2,000 to 6,000 feet (610 to 1,830 m)GeologyTypeAlluvialAge2-3 million yearsGeographyBounded bySierra Nevada (east), Cascade Range, Klamath..