Nicasio Valley loop, 17.9 MPH.
And I've come to accept that there are no bike paths, just multi-use paths, but you'd think that on paths that are striped for bicycle traffic (yellow line down the center) people could perhaps manage to stand to the same side, rather than standing to opposite sides in such a way that a cyclist has to slow to walking pace and run a wacky slalom while their dogs bark menacingly.
You'd think.