Yep, right by my house in Monticello WI off Hwy. 69.
If you want the twisties, (but watch out for those manure spreaders leaving you know what on the back roads though) on 39W out of New Glarus heading NW towards Dodgeville WI, this is the place to be for sure!
You could even head from Chicago IL NW thru Rockford and Freeport if you do not like the Interstate traffic/speeds up to Hwy. 26 in IL and once you reach WI, 26 becomes hwy 69 thru Monticello/New Glarus and go from there. You may lose a little time unless traffic jams on I-90, but much less traffic, better scenery, and even maybe a shorter mileage route? Prairie du Chien to LaCrosse along the Great River Road cannot be beat-much better than Interstate anyday!!!!
For all you flavored popcorn lovers coming this way, be sure to take a rest stop in Montfort WI (don't blink, you'll miss it) on the left side of the road at rural route 1 popcorn outlet store. Best flavored popcorn bar none at:
http://www.ruralroute1.com/thanks for the update TAZ.