When I look on the map, I see Avila Beach Drive turns off onto a road that has several names: Diablo Canyon Rd, Pecho Rd, Lighthouse Rd.
This appears to follow the coast fairly closely and turns into Pecho Valley Road which leads into Montana De Oro State Park Road.
This looks promising on Google maps, but portions of the road are marked "Restricted usage road", but does not say what the restrictions are.
Is this route paved, or gravel, or dirt? Is it suitable for bicycle? What does "restricted usage road" mean? I will be riding a mountain bike with hybrid tires, but I could put knobbies on if needed.