HAve done it both ways but only on a cage. Some areas you hug the ocean but you are high above it.
This is typical - last November.
make sure you cut off the PCH when you see a sign for Pelican Brewery
Excellent food in a lovely setting on the beach with surfers - pretty dramatic spot
three are some great bridges too.
just be careful of gawking drivers. A bicyclist got hit and killed just as we drove through - went through the windshield and we alsmost got into a headon coming onto the bridge above. I had to come to a full stop .....total idjit passing where he did.
I'd say the best parts are far from San Luis Obispo north throught Big Sur and Monterey.
North of San Fran it can get iffy with fog tho Muir Woods is spectacular.
You might want to swing over to catch Mount St. Helens.
We got fogged out in Novemember until we got further south.
On that first shot you can see the fog bank lurking off shore.
One of the best drives in the world tho so take your time and enjoy.
On a bike I'd likely want to go south bound.