How to plan a Pacific Coast Highway trip

Los Angeles and San Francisco are the two ends with airports worth using, and one-way with a drop fee beats a loop, which retraces the same coast for no gain. South to north puts the ocean on the driver's side and the sun at your back all afternoon, though plenty of people rent the other way round, picking up in San Francisco and dropping in LA. Either works.

Four days one-way is the version that still has evenings in it. Three works if you skip Hearst Castle or the Monterey overnight, while two days is really I-5 with a detour. How many hours to drive per day still applies, because the Big Sur stretch looks short and runs long. Fix the fly-in and the night count first, the way any road trip wants.

Carmel to Cambria is the day everyone underestimates, because McWay Falls, Bixby Bridge, and every unmarked turnout add forty minutes each. The road is two lanes, often 25 miles an hour, and it closes after slides, so check Caltrans the week you drive. Checking it the month you booked tells you nothing useful. And do not stack Hearst Castle and a sunset at Pfeiffer on one afternoon.

Monterey and Santa Barbara are the towns that absorb a short day, so sleep in one of those, because a Big Sur inn you cannot cancel is a poor bet on a road that closes. San Francisco is a city night at the north end, and Los Angeles is a city night at the south end, one neighborhood at a time. Treating either as a driving day is how the coast gets rushed, since the city night is the rest you need.

Night one: land in Los Angeles and sleep on the west side, or push two hours to Santa Barbara if the flight lands early enough. Day two: Santa Barbara to San Luis Obispo or Cambria, with the coast road after lunch. Day three: Hearst Castle in the morning if you booked it, then the Big Sur stretch north, sleeping in Monterey or Carmel. Day four: Seventeen-Mile Drive or Cannery Row, then the two hours up to San Francisco for a flight or a city night.

Reverse the whole thing if you fly into SFO. Every day stays inside the four-to-five band as long as Big Sur gets a day of its own. A road trip planner with those four stops will show you which day blew past five hours once the pullouts are counted. Napa is a different trip. Do not bolt Napa Valley onto a Highway 1 itinerary unless you have a fifth night inland.

Lock the rental, the first and last night, and Hearst Castle if you want it, because timed entry sells out. Keep the Big Sur overnight refundable. If the highway closes at Lucia, US-101 inland is your backup, and a locked inn on the closed stretch is a night you pay for and never use. Optional detours stay beside the route: Point Lobos, a second Santa Barbara dinner, a morning in San Diego before you start north.

Maps is the navigation layer once the days exist. The days themselves need drive time on each leg and a link the rest of the car can open, which is what the road trip planner is for. Planning in Google Maps will still get you round the next curve.