Driving Roads / Pacific Coast Highway

Officially California State Route 1, it threads 656 miles of cliffs, redwoods and seaside towns, with about 72 miles of Big Sur cliff road widely called one of the most scenic drives in the world. It runs about 656 miles along California State Route 1 in California. Drive time: about 16 hours without stops (plan 2-3 days).
Best time to go: Year round in most places, but the Big Sur section is prone to winter storm and landslide closures. Check Caltrans QuickMap before going.

Sources: Length · Best time. Drive time is the route time for the mapped route without stops, from Mapbox.
Record each leg and your drive log keeps the distance, time and day of every one, so the whole coast fills in on your map. A scenic-cruise road, not a top-speed road.
Watch for fog, cyclists and frequent pull-out traffic on the narrow coastal cliffs; use turnouts to let faster traffic pass.
Open Road keeps every drive: the route on a map, the time and the distance. On iPhone and Android.