Not sure OGE, but I think it goes through Giant City.... dont know
Vmom- down there it is hilly, etc for the most part. That is probably the main area for climbing outdoors in Illinois or one of the better places.
Where I'm at, we have the bluffs. I sit about 10 miles, probably less, to the Mississippi River. Our camp could have some climbing, wouldnt you say purcelce? I know the Girl Scouts wanted to do that one year, but their instructor ended up overseas.