I think it's something like
this but I might have it wrong. I pretty much just follow the leader. A lot of the first half is residential so if you get pinned for speeding it can hurt. The road also isn't the smoothest and if you're really picky about road conditions like I am, it can be disconcerting. The last half I'm not sure if they go down Decker or stay on Mulholland usually. I don't remember there being a building at the intersection with PCH the last time I went with them (which was years ago).
Ya don't need to be worried about being slow. I'm the slowest guy around and I still pop out once in a while to bog them down.
They're good at waiting and junctions so you don't get lost.