Where to ride in Southern Wisconsin?

I'm racing IOLA WORS on Sunday and then plan to spend the next couple of days working my way back to MN.  In the past I've spent lots of time riding in central, western and northern Wisconsin at places like HPT Lacrosse, Blue Mounds, Wausau, Steven's Point, Levis, Cable etc. etc..  My plan is to ride 2-4 hours in the morning and repeat in the evening.  My goal is to improve my handling skills and get some solid time on my mountain bikes with an eye towards preparing for a couple later series races and the Keeweenaw Chain Drive.  Should I venture further south and west when I have the chance?  Where would you go?