Walking San Francisco (FalconGuide)
By Liz Gans and Rick Newby. Amazon quote: "I love this book. I have done about 7 of the walks so far and they have all been brilliant."
On February 2, 2003, Kim and I killed a couple hours by walking from
the Mission district (Valencia & 19th) to the Castro district, and
then to the top of Twin Peaks. At 910 feet above sea level, it is
not the highest point in San Francisco City/County, but certainly the
most popular, with a four-lane paved road to the summit and some grand
views.