at about mile 42 when you would turn right on Lyons Valley rd...turn left...go about 1.5 miles down, there is a store on the right that has everything you would need. turn around and head back on route.

the next stop after that is at about mile 62ish.

I have done this route from the 30 mile mark out several times. the "great western" as they call most of the route used to be my team route every saturday.