I found an elevation mapping overlay for google maps. The most direct route around the lake is via larger main roads with an exception for the road between Willard and roughly Caywood. Here the main road diverts through Ovid and Lodi (One of the bigger finger lakes wineries, Lamoreaux Landing falls in this leg of the route, FYI). The main roads here are obviously graded more gently and gradually. I have no idea what the official route will be, but I suspect it will be one of these:
The more direct route
The main road route
I arbitrarily made the map start northward from the starting point, but whether this will be the case is anyone's guess. In this case just read the graph backwards
. I personally hope for north given all the long gentle downward inclines a clockwise trip would yield, as I'd much rather climb short steep hills than long inclines.