Hobbes famously wrote in Leviathan that life was "nasty, brutish and short". He could easily have been talking about Fillmore Street. Seen from below, you might look up at it and think, how the hell am I going to get up this wall of pavement? But don't let that scare you. While the climb can be very intimidating, focus on the last part of Hobbes statement. It's "short". We're talking about only 4 city blocks here.
Fillmore is not the steepest climb in San Francisco. That dubious honor goes to Filbert Street, but it's probably the most famous because, for years, this short climb was featured in the San Francisco Grand Prix. It's was a serious spectacle. Throngs of spectators lined the street watching professional cyclists duel it out on the wicked little ascent.
A couple things to keep in mind while watching the video. The cyclists may be younger than us and fitter than us, but they were racing and doing a circuit that took them up the climb 10 times. We'll do it once. And we're not racing. Typically, recreational cyclists have easier gearing, compact and triple cranksets. So while some of the pros were forced to weave up to the top, you shouldn't let that intimidate you. (That's not to say you might have to resort to weaving.)