Show lake okeechobee florida lake okeechobee in florida is circular in shape and about 30 miles in diameter it is with the exception of lake michigan the largest freshwater fresh water lake wholly within the united states it lies immediately north of the everglades at mean level it has an area of acres earv early explorers believed the lake was fed by subterranean streams or large springs A few years ago this theory was vas more or less exploded by investigations at low water these failed to disclose any such source of supply it is believed that okeechobee relies entirely on rainfall |