We drove the PCH (mostly 1 and some 101) from SD to the top of WA a few years back. There are quite a few interesting places to stop and see - do that to gain the most enjoyment and learning - and it will take at least a week, probably more You will see a bunch of fabulous scenery, but, as already noted, the 30 or 40 miles coming up to SF through Pacifica to the GG Bridge was by far the bad part of the entire drive.
