Re: San Francisco Crossfit- Worth It?
3.5 miles really is nothing, but SF can suck. Depends on the area. If you don't have hills, that's 30 minutes on a very casual ride depending. SF can really suck on a mtn bike though. Definitely road bike.
Luckily, getting around in SF with local transit is super fast. I think buses run every 15 minutes.
Most of the area around SFCF and the Presidio is fairly moderate biking wise if I remember correctly. From Fisherman's wharf to the Presidio.
To me, it always seemed like the hills and elevation was mostly on latitudinal lines vs longitude. But it all depends where you are living.