Chillicothe, MO is the halfway point between Quincy, IL and Topeka, KS.
Halfway is the western part of the Denver metropolitan area. I'd break that trip up into thirds.
Sparland, IL
Woodridge, IL
Waukesha, Wisconsin is the halfway point between Madison, WI and Gurnee, IL.
Pierson, IL
One halfway point between Decatur, IN and Yorkville, IL is Toto, IN.
Effingham, IL is about halfway between these two cities.
Greer, IL.
Sideview, TN is your halfway point.
There is a Claxton GA, but no Aurie IL.
Morton, IL
Denver, Colorado is about halfway.