Cottonwood Lake sits just one mile east and half a mile north of Alamo in Williams County, North Dakota. This warmwater fishery is managed primarily for walleye, with fingerlings stocked annually by the North Dakota Game and Fish Department. The lake supports natural reproduction and growth of warmwater species and provides a diverse fishing experience. A fishing pier enhances accessibility for anglers of all abilities. The lake is part of the Upper Missouri River Basin watershed and has experienced periodic challenges with winterkill events, most recently a partial winterkill in 2023 that primarily affected the walleye population.