The Ventura Freeway begins at the Santa Barbara/Ventura county line at the Bates Road exit of U.S. 101 (Exit 83), west of La Conchita. The road alternates between a freeway and an expressway up to the seashore community of Mussel Shoals, when it becomes a freeway for the rest of its length. The freeway travels eastward through the citrus orchards and strawberry fields of the Oxnard Plain before ascending the short, steep Conejo Grade into the Conejo Valley. Continuing eastward through the northern Santa Monica Mountains, it crosses the Ventura/Los Angeles county line before entering the San Fernando Valley. The freeway continues eastward along the valley's southern rim, crossing the 405 and 5 freeways and the Los Angeles River. After passing through Downtown Glendale south of the Verdugo Mountains, it continues along the southern slope of the San Rafael Hills between Glendale and Eagle Rock before entering Pasadena near the Arroyo Seco and terminating at the Foothill Freeway.