Looking at my pre-Quabbin map of the area, with the proposed reservoir overlaid, I think this is River Road or it may be a continuation of New Boston Road in Shutesbury. River Road seems the more likely. In modern terms, it is a road that runs between Gates 16A and 16. I wasn’t expecting anything this lovely when I started my hike but who’s complaining? Not I.
For the fungus amongus enthusiasts, this little gem-studded puffball (Lycoperdon perlatum) awaited me as I returned to the car.