Ninerfan,
I am a member of the Benicia Bike Club. We ride your way often. The route Veronica mentions- Pig Farm loop- is easiest if you approach it from the east side. Another great route in your area is Bear Creek Road. If you go out Pinole Valley Rd and turn right when you get to Bear Creek Rd, that will give you a nice ride over to San Pablo Dam Rd. Then return to Pinole Valley Rd via Castro Ranch Rd. When you get to the end, turn left and you will be back on Pinole Valley Rd going west.

If you are interested in riding let me know. We come to Martinez and points beyond on Tues, Sat. and Sunday. You could meet us at the end of the Carquinez Bridge (Crockett side) OR in Martinez.

Look us up at Benicia Bicycle Club.org

Nancy