I used to do the Marin Sunday Morning Ride with the author of that article, Gabe Ets-Hokin.
The ride starts at the SE corner of Mt. Tamalpais (Tam Junction in Mill Valley), CA Highway 1 northbound. Mostly slow hair pin turns up and over and around the mountain for several miles with the Pacific Ocean on your left, finally long downhill to Stinson Beach, then fast to very fast long sweepers for several miles just a few feet from Bolinas Lagoon.
About one mile after turning inland from the Lagoon is an uphill section about a half mile long, through the eucalyptus grove, fast turns if you know the road, with a sweet "wheelie bump" near the top where even an almost 600 lb '00 BMW R1150GS gets a lot of air for a good long time at speed.
That's a fun ride if it still happens. The CHP seemed to have decided to put an end to it, and they might have succeeded by now.
Just to prove a point, about 30 years ago local club racer Craig McClean appeared on some type of scooter and creamed just about everyone except a small handful of the fastest guys.