 Elevations range from 590 to 890 feet (180 to 270 m).Sculpted by glaciers and an ancient glacial lake, it now contains the Sylvester Pond and the Delirium Pond, as well as parts of the headwaters of the Pine and Waiska Rivers.Delirium Wilderness is thickly forested with swamp conifer, aspen, and white cedar, with stands of red and jack pine growing in its drier areas.