I only go to SF if I have a very good reason. I believe the most recent time I went there was accompanying my daughter who was going to a consulate to apply for a student visa. We caught BART in Milbrae, got off at the UN Plaza station, walked ~3/4 mile to the consulate (through the Tenderloin, blech), and then the same in reverse. There are several running events annually in SF that include scenic places like Golden Gate Park, the Presidio, the Golden Gate Bridge, and Crissy Field, but I won't do them unless someone else drives. Politics and bum crap aside, driving and parking in SF is nuts!