Sierra County: Yuba County to Yuba Pass U.S. Route 50 SR 49 in Placerville to Nevada Route 50, crossing of the Sierra Nevada via the American River Canyon and Echo Summit towards Lake Tahoe Designated April 2, 1985, in El Dorado County: Placerville Drive in Placerville (west of SR 49) to Echo Summit Designated April 1, 1986, in El Dorado County: Echo Summit to South Lake Tahoe State Route 52 I-5 in San Diego to SR 67 in Santee Route 52, runs along the northern boundary of Mission Trails Regional Park with scenic views of Cowles Mountain Designated February 2, 2016, in San Diego County: near Santo Road to near Mast Boulevard in San Diego State Route 53 SR 29 at Lower Lake to SR 20 near Clearlake State Route 57 SR 90 in Brea to SR 60 near Industry State Route 58 SR 14 near Mojave to I-15 in Barstow State Route 62 I-10 near White Water to Arizona Twentynine Palms Highway, runs through scenic high desert country and Joshua Tree National Monument Designated September 14, 1972, in Riverside County: I-10 near White Water to San Bernardino County State Route 68 Monterey to US 101 in Salinas Route 68, runs through areas of oak, sycamore, and pine trees east of Monterey Designated June 19, 1968, in Monterey County: SR 1 in Monterey to Salinas River State Route 70 SR 149 at Wicks Corner to SR 89 at Blairsden State Route 71 SR 91 near Corona to SR 83 in Chino Hills State Route 74 I-5 in San Juan Capistrano to SR 111 in Palm Desert, California Part of the Pines to Palms Scenic Byway (also a National Forest Scenic Byway), scenic drive from the forests of San Bernardino National Forest to Mojave Desert areas Designated October 18, 1971, in Riverside County: San Bernardino National Forest west boundary to SR 111 in Palm Desert State Route 75 I-5 in southern San Diego to I-5 near Downtown San Diego Silver Strand Highway, scenic drive along the Silver Strand and across the San Diego-Coronado Bridge Designated March 4, 1974, in San Diego County: Imperial Beach to Avenida del Sol in Coronado Designated February 17, 1969, in San Diego County: San Diego-Coronado Bridge State Route 76 I-5 in Oceanside to SR 79 near Lake Henshaw State Route 78 SR 79 at Santa Ysabel to SR 86 near Salton City Anza-Borrego Desert State Park