There was Niles Canyon out of Fremont or Hayward I think, but that was to Livermore. Altamont Pass was one to Fresno from Livermore.

Speaking of Livermore, my Uncle bought the old Livermore ranch in the '30's or '40s, which bordered the freeway on the way to said pass. The hills were mostly grasslands, but for the eucalyptus covered 19th century cemetary that bordered the ranch. I used to walk the grasslands as a boy, sometimes hunting jack rabbits with Mickey the beagle in the summer evenings. Fond memories those.