Regarding the map on the previous page, that's to the end of the 
paved road.  The Patriarch Grove and White Mountain are yet another 12-16 miles over gravel road to the north.
You can follow the road on the map if you zoom in several more clicks.
Edit:  Here is the map with point "B" at the Barcroft gate.  (Try the "Sat" view, and zoom all the way in.   

 ) 
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