Growing up, we made the drive from San Francisco to Santa Barbara several times a year to visit my grandmother who lived in Solvang (which is a fun side trip, though not on the PCH).
The most commonly driven part of the Pacific Coast Highway (PCH) is California Highway 1, which covers just due south of Los Angeles to quite a bit north of San Francisco. Snaking all the way up the U.S.’s west coast, the Pacific Coast Highway stretches 1,675 miles from California to Washington, starting in San Diego, CA and ending in Olympia, WA (or vice versa).
The Pacific Coast Highway is up there with the most beautiful drives in the world.