“There is one. Nacimiento-Fergusson Road.”
Yes there is, and I’ve driven it. While it’s a breathtaking drive, particularly the switchbacks that take you down to highway 1, but it’s not a road that you use to commute to work. You have to go all the way down to Hwy 46 to find a major east-west highway and it takes you to Paso Robles and 101. Or as you suggest, you can take Jolon Rd. From Mission San Antonio. Back when I was young and Vietnam was going on, you had to watch out for tanks crossing Jolon Rd.
Many years ago, we were coming South on Hwy 1, at the end of a long vacation, and grew tired of it. The map showed a way to get to 101 just South of Lucia so we took it. :)
Shirley was driving when we got pulled over for a warning by the MP’s on Hunter Liggett.
True enough. That's also called "Green Valley Road".
There's a backroads way from Cambria to Paso, but a portion of it is still dirt road.
And up on the Southern Big Sur Coast, there's a way to get from just a little ways North of Gorda to the Coast Ridge, and then over to Naciemento-Fergusson.
Back in those days Willow Creek road (from the Coast, near Gorda) was more often called Willow Creek Los Burros Road, with the Los Burros portion going down the East side of the ridge into the Hunter Liggett, although I can;t say I ever traveled it, and wouldn't want to try. At it's best it was one bad road, or so I've been told. There were a few other jeep tails too, including one that used to tie in from the Southern end of the Coast Ridge Road to Bryson -- but I've never traversed it, and don't think it's any longer possibly to do so, not for a few decades, by now.