My daughter just e-mailed me the following sites for rides...I haven't checked them out yet but you might find something at one of them.

http://www.bikeamerica.info/rides/Midwest/
this is an okay website... i have it "bookmarked" on the midwest page

http://www.mikebentley.com/bike/
this is a really good link... i can't remember if i found the bike aid ride
on this website or the next...

http://www.goodcyclist.org/rides.htm
nope, it was definitely this link where i found bike aid... these are all
chairity links... there are a TON in
Illinois/Indiana/Wisconsin/Michigan/Ohio!!

http://www.traillink.com/
plus, this is a directory of all of the "rails to trails" in the country,
including Illinois and Michigan! rails to trails are usually long, flat
trails, like the prairie path (actually, the prairie path and GWT are both
rails to trails)
good luck with your training... gretchen