When fishing such a big lake, a boat is almost a must. And, a couple of points merit consideration when using a boat on Big Mac, whether for fishing, skiing, or other kinds of fun. First of all, as the irrigation season progresses, water levels will drop and some boat ramps will not reach the water. The longest public ramps at Martin Bay, Cedar Vue, Otter Creek, and near the area headquarters at the south end of the dam, can get rather busy, so allow extra time for launching and removing. Come visit us in , Nebraska