I know the road. It is a good one. I cross through redwood highway and then zigged and zagged up to Dublin then took Marsh Creek to Discovery bay then the delta to and then up to farmington to 49 up into the mountains to Topaz and coming down to Murphy's. epic ride. 80s to 100. Perfect for that bike.Very nice, I used to love Highway 4 and 108 when I lived in CA. I can't tell from your map, but did you take Morgan Territory Road when passing by Mt. Diablo? If not, I highly recommend it next time.