You'll like this ride. To cut off some miles, you can turn right at the bottom of Morgan Territory onto Manning, right again onto Highland, then right onto Tassajara, and a final right onto Blackhawk (to get to Mt. Diablo). This will still give you a good, hard 60 mile ride. FYI cell phone coverage seems to have improved, but there are lots of dead zones back on Morgan Territory - make sure you have everything you'll need to fix flats, food, etc!
JB