In its history, no lake in Minnesota has offered better walleye fishing on opening day than the Upper Red has since it was reopened to walleye fishing in 2006. Yes, sometimes the northwest wind blows on this monster lake and whitecaps roll, keeping boats tied up in safe harbors. But on most days it’s just jig-and-a-minnow — and fish on. Midsummer action can be less predictable, as fish spread out in this shallow dish of a lake. But from mid-May through mid-June and even beyond, limits abound.