Ask the locals in Bakersfield about Hwy 58 to San Luis Obispo and they’ll tell you there’s no such thing and then direct you to the super-slab Hwy 46. Don’t listen. Beginning about a dozen miles west of Bakersfield, Hwy 58 is a roller-coaster all the way to the coast. Giant sweepers with giddying changes in elevation run through pastoral farmland for more than an hour. Then suddenly the road tightens down into twisting loops as you dive into canyon country. Just as suddenly, it all stops and you find you’ve arrived at San Luis Obispo’s back door.