Grand Geneva Resort & Spa (Brute Course at Grand Geneva Resort & Spa) is a 36-hole resort golf course in Lake Geneva, Wisconsin, built in 1968 and designed by Robert B. Harris. It sits in the $$$$ (splurge) price range for golf in Wisconsin. The season runs Apr 1 to Nov 1. Guests are welcome.
Details like fees and seasons change, so call the course before you head out.