Disc Golfing, Frolfing, or Frisbee Golf is growing in popularity, and there are 185 courses in Wisconsin alone. But, the one course that I would recommend most highly is Winter Park in Kewuaunee, WI. This course has 27 holes!
Located on a winter ski hill, this course winds up and down the hill, through the pines, crosses mountain bike trails, and has a hole 16 that consists of a huge drive from the top of the hill to the parking lot below.
I would recommend this to any intermediate players, and I would also recommend to bring extra frisbees. It is very easy to lose a disc in these woods, especially with the ravines and creeks that run through the course.