This short little bit of narrow road is a bit of a legend in California. It's known as Rossi's Driveway. The reason offered being that if Rossi had a driveway it must be like this road! Much of the road has no center line, and it rises and falls like a roller coaster. While many roads are nicer to ride uphill, I prefer riding this one downhill (from Creston to Hwy 58) because it feels like skiing. The last time I rode it the road surface was quite good, though there are some corners that collect sand. Watch to overeager car drivers coming the other way.
I'll be riding it again with a month, and if anything changes from this review I will post an addendum.