We go up there several times each year. The Greenville/Indian Valley area is very flat. The roads around the lake have some rollers but not to technical. You can get into some climbing very quickly. There are several other century and other rides in that area. http://www.indianvalley.net/centuries.html http://www.summersolsticecentury.org/
http://www.chicovelo.org/quincywkend.html
It is beautiful up there.