6 Things to Make Sure You Have For Fishing Opener in Minnesota Minnesota's annual fishing opener is a treasured tradition that celebrates our state's great angling opportunities and signals the beginning of summer. Usually, the fishing opener aligns with Mother's Day weekend, but in 2021 it is a week later than usual. This year Governor Walz will be fishing a lake in Ottertail County. The specific lake has not been named, but I know for a fact there is some good fishing up in that area. Best of luck anglers, and don't forget these things when you hit the water. 6 Things to Have for Fishing Opener in Minnesota