Wis. Stat. § 350.1025

Except as provided in this section, the intoxicated snowmobiling law is applicable to all property, whether the property is publicly or privately owned and whether or not a fee is charged for the use of that property. The intoxicated snowmobiling law does not apply to the operation of a snowmobile on private land not designated as a snowmobile trail unless an accident involving personal injury occurs as the result of the operation of a snowmobile and the snowmobile was operated on the private land without the consent of the owner of that land.