I have ridden the Portland one dozens of times and the SF peninsula one maybe a half dozen. Funny story, how I learned about motorcycle tribalism. 1977 or 78, I'm. riding up La Honda road from SF airport on my way back to LA. It's a Sunday morning. About halfway up I start getting passed by dozens and dozens of motorcycles. I get to the market/tavern kind of establishment at the top of the climb and the huge parking lot has the riders of different kinds of motorcycles congregating in different corners of the lot--hog riders one place, UK riders on their Triumphs and Nortons in another, Japanese and Italian bike riders in yet different locations. Funny, and more tribal than any group of bicyclists I've met before or since!