Through an online search, type in "female retreats in the U.S." or similar key terms. This should lead you to several retreat-focused listings and search engines. In particular, a website like RetreatFinder.com can be of help to you.
If using RetreatFinder.com, you can filter down the results they provide by type of retreat, and by location. Select United States under the "Filter by Country" option, and to the right of this option, select "Sort by location." Scroll down to the section of result where Wisconsin locations are grouped.
Click on retreats that sound fitting to what you are looking for; titles of each description are linked to the detailed of these specific sites, which provides the retreat homepage link. Click on these links for more specific information on scheduling, resources, and accommodation.
Make sure you do an internet search of the retreat you select in order to find reviews or testimonials; if you are local, it may even help to visit the site. Once you are sure in your decision, book your stay at your desired retreat! If you haven't yet found the best fit, return to your internet search engine and search "female retreats in Wisconsin" to see what other options and retreat listings may appear.