This gets kinda fun in the Tomahawk area.
Statewide the gamefish opener is always the first Saturday in May, which this year is May 7. This includes walleyes and pike but not bass, which opens as a catch and release season for largemouth and smallmouth from May 7 through June 17 - for spawning purposes. The season for bass opens June 18.
Of course, the walleyes and pike season is open year around on Mohawksin and the Wisconsin River system south. Last year or the year before the gamefish season on Lake Alice was closed to resemble other inland lakes and now opens May 7.
Hope this helps. Good luck fishin'