Upper part starts off slow, but quickly picks up speed. Hang right at the round about. Things slow down for a bit and you might have to take a few pushes.
The final stretch past the last parking lot can get intense , especially if you want to take things down under the Golden Gate. Be careful of cars, pedestrians and bicyclists entering that parking lot if you are headed that way.
You will pass by a security guard in a booth and if you are hauling ass, it might cause attention, slow down for a second to breeze by covertly.