Small Stream Trout Fishing 101 Written by Len Harris Photos by Len Harris It is mid January and Wisconsin small stream trout fish­ing has been closed since September 30th. Season has been closed for almost 4 months. You are feeling the need to have a large Southwestern Wisconsin trout on the end of your line. Because season is closed, the only things you can do is read about trout fishing and clean your gear and stock up for the upcoming season.