The way points of this bicycle route:
Unridden longish mostly rural ride with relatively little climbing, "only" 3500' in 80 miles. Avoids worst part of Diablo and Morgan Territory, but not all. Nasty bits through Walnut Creek. I don't know about Marsh Creek and Vasco Road.
Summit near here.
Summit near here.
Summit near here.
Summit near here
Summit near here
Summit near here.
Summit near here.