You lucky guy.
I’m on a business trip now and don’t have time for a detailed reply, but PM me and I’ll give you some options.
I live in Santa Rosa and ride the roads up to sea ranch and such frequently. I’ve never been north of there, but I’ve heard about some possibilities.
A few quick questions and points -
stay off of bodega highway, too much traffic and no shoulder. It’s a good way to get killed.
I hope you’re a strong cyclist, a rough estimate for Napa to Sea Ranch would be 6-8 hours with upwards of 8000 ft climbing, depending on your route selection.
Do you like climbing? I hope so.
Would you rather ride along the coast, or through the hills and the redwoods? My suggestion for most scenic, with the least traffic would be to cut through the hills - some of the roads are amazing.
roads to think about (get a map)
mt veeder road, silverado trail, highway 128, chalk hill, warm springs road, graton road, occidental (a town) bohemian highway, austin creek road, cazadero (a town), king ridge road, tin barn road, skaggs spring road, and highway 1.
Lots of options, pm me for my email or phone #. you’re in for some world-class riding. I hope you like hills…
one other point is plan on being unsupported for several hours at a time, three water bottles is a very good idea.
Very nice 25m pool in sea ranch if you get the chance, and nice running along the coastal trail.
J