You need to provide information to narrow down the list of "suspects". Was the cone collected from an urban or suburban landscape? If yes, then the tree could be ANY conifer used for landscape material in the greater San Francisco area.
If the cone was collected from a wilderness area, then the list of suspects can be easily narrowed down to trees native to the area you collected the cone from.
Wikipedia is your friend. The new world cypresses are a good candidate. The genus is Cupressus, or the latest taxonomy renaming is Hesperocyparis.
There are several native to California, and they are popular as landscape plants. Cupressus pygmaea sometimes spelled pigmaea, is the Mendocino cypress. And Cupressus goveniana is native to Monterey county, south of San Francisco, both are used as landscape trees around SF. There are several other Cupressus native to CA that are candidates. Also, if this came from an urban or suburban landscape it could be the Mediterranean Cypress, Cupressus sempervirens.
I am fairly certain you have a Cupressus or Hesperocyparis. Browse Wikipedia entries and see which fits what you have
If you are able to navigate "botanical speak" one of the good official references is Flora of North America, an on-line botanical reference.