Ok, I have no idea if any of these roads are gates/locked, but how about something like this.
Of course, this is only possible if there is gas in Pinecrest, but the internet says there is a Shell station on Pinecrest Lake Road. You would need about 100 miles of range, but several of us will have extra gas to help i you don't. We would have to ride fast to get all this done in a day.
Edit: For those with a GPS, you can download the Garmin GDB file here.
(Right click and "Save Link As")