Originally Posted by
Polaris OBark
It is not that bad. You are very unlikely to be bodily harmed. Theft, however, is something you will have to be vigilant about. It is very expensive to hotel it in the city. You could stay closer to the airport, or somewhere in Marin. If you stayed near the airport, it would be easy to just take the commuter rail (BART) into town. There is a lot in the East Bay, too. Berkeley is close by, and although by no means crime free, might be a bit easier on your wallet. (I lived there for six years while in grad school.)
My comment was aimed at biking around San Francisco. The drivers are seriously crazy and I've been hit twice. The first time by some clown on a motor scooter and the second time by a car. Fortunately, on a 600# motorcycle and didn't go down, but I quit riding in SF. Much different on foot or in motorized transport. Just be careful of the homeless people. Many of them are paranoid schizophrenic and can be unpredictably violent.