Interesting, but they only list the following under "USA CALIFORNIA" (areas in California not in the Sierra):
Lost Coast Trail
California Riding and Hiking Trail Joshua Tree
Sykes Hot Springs Ventana
My thinking is that there are actually more non-Sierra hikes than 3 in all of California.
They do have an email link where you can suggest other hikes. May I suggest that Skyline doesn't need to be on this site? Skyline has enough notoriety already!