Central Illinois isn't known for much variation in the terrain. It's not uncommon to navigate from water tower to water tower....
but we do have spots where you can get more ups and downs than you really want. These tend to be closer to the rivers, though....
The wind here is not really my friend. On the worst days, I'll go ride the hills just to have the wind blocked. Winter and spring are when the wind is the strongest.
Steve in Peoria