The Salem bike club sponsors the Peach of a Century in the fall. They managed to schedule a sunny day without wind this year (how do they do that?). The route is pretty darned pastoral: covered bridges, pumpkin fields, the whole bit.
The Solvang (located East of Santa Barbara) Centuries are awesome. They are late in the cycling year or very early. Clean fresh air, but it can be cold. I live in southern california so anything under 50 is cold for us.