I haven't found a consolidated one, but this thread is a good one for most of the local central Wisconsin-ish stuff.
For around Wausau, there's 600 yard 5-shot group shoots at the Mosinee public range in the summer months hosted by The Marathon county rifle & pistol club, inc. I dont think they have a schedule up yet though. They're on facebook.
You just missed the Marv Bohmann Memorial 700-yard cold bore shoot in Marshfield. First Saturday of march every year.
T&T Riders in Marshfield has 5-shot group shoots during the winter months and rifle and pistol pin shoots during the summer. I'll try to keep those shoots up to date here. The facebook page is mostly for dirtbike riders as the shoots are hosted at a motocross track. There's an auto-loader shoot coming up, details above.
Wisconsin Precision Rifle Steel Challenge series hosts shoots over near racine i think. They have a facebook page as well.
There's a private range in Wood County near the public range where they host 600-yard benchrest stuff. not sure what it's called though, but i've been there a few times.
There's Benchrest F-Class type shooting in Eau Claire and Lodi and others in the summer. NRA stuff.