The weather only cleared today, so I hauled the Cosine Wherry over the extremely potholed and muddy road up to Point San Pablo Yacht Harbor. They have no real launching, but you have access (of a sort) to a beach owned by Chevron. Here is the thread from a year ago when I scouted the road and launching area - http://forum.woodenboat.com/showthre...t-Harbor-visit
Rather than risk getting stuck I just dragged the wherry down to the water, then rowed past the ruined whaling station at the point.
Then I rowed around several ruined piers and south towards scenic Winehaven and Point Molate.