I've live in North Georgia and have ridden these roads.
I climbed Wolfpen in both directions three times since April.
Hogpen hits 12%. There are lots of short 10% sections on the route. The inside of hairpin turns can be much higher grade but these are not able to be shown on Ride with GPS and are avoidable by riding to the outside of the turn.
Not sure anyone mentioned it but a trainer could be used to simulate effort.
-Tim-
Last edited by TimothyH; 07-16-19 at 09:59 AM.