to SR 120 near Mono Lake Designated June 5, 2000, in Mono County: Lee Vining to Bridgeport Designated June 5, 2000, in Mono County: Bridgeport to Walker Interstate 580 I-5 near Tracy to I-80 in Oakland Route 580, traverses the eastern edge of the Coast Ranges and the western edge of the Central Valley Designated June 7, 1974, in San Joaquin County: I-5 near Tracy to Alameda County Designated February 18, 1970, in Alameda County: San Joaquin County to I-205 near Tracy MacArthur Freeway, scenic landscaped route through Oakland Designated June 25, 1976, in Alameda County: San Leandro to I-980/SR 24 in Oakland Interstate 680 Milpitas to SR 24 in Walnut Creek Route 680, crosses wooded hills and valleys of the Coast Ranges Designated June 15, 1978, in Alameda County: SR 238 in Fremont to Bernal Avenue in Pleasanton Designated October 22, 1982, in Alameda County: Bernal Avenue in Pleasanton to Contra Costa County Designated October 22, 1982, in Contra Costa County: Alameda County to SR 24 in Walnut Creek Designated county highways County Route A18 Lake Boulevard, scenic drive overlooking Shasta Lake Designated 1981 in Shasta County: Whiskeytown-Shasta-Trinity National Recreation Area County Route G14 Nacimiento Lake Drive and Interlake Road, travels through the foothills of the Santa Lucia Range in the vicinity of Lake Nacimiento and Lake San Antonio Designated 1981 in San Luis Obispo County: Chimney Rock Road near Paso Robles to Monterey County Designated 1971 in Monterey County: San Luis Obispo County to CR G18 (Jolon Road) at Lockwood County Route G20 Laureles Grade, a steep, winding scenic road between Carmel Valley Village and Monterey Designated 1969 in Monterey County: Carmel Valley Road to SR 68 near Monterey County Route N1 Malibu Canyon Road and Las Virgenes Road, traverses Malibu Canyon and the Santa Monica Mountains Designated 2002 in Los Angeles County: SR 1 in Malibu to Lost Hills Road in Calabasas Mulholland Highway The western segment of Mulholland Highway through the Santa Monica Mountains from Leo Carrillo State Park to Rocky Oaks Designated 2002 in Los Angeles County: SR 1 at Leo Carrillo State Park to CR N9 (Kanan Dume Road) near Cornell The segment of Mulholland Highway through Malibu Creek State Park Designated 2002 in Los Angeles County: Cornell Road to Las Virgenes Road River Road The segment of River Road not signed as part of SR 160 that runs along the Sacramento River in