Abstract: A hot tub has a bathing enclosure surrounded by a peripheral tub wall. The tub wall has a peripheral upper rim at a level above a surrounding tub-supporting surface. The tub has a water recalculating system for maintaining water in the tub at a level below that of the rim. The tub has a covering apparatus which includes a vertically extending support structure exterior to the tub wall. A drive is mounted on the support structure exterior to the tub wall. A pair of laterally opposed elongate tracks is mounted on the support structure exterior to the tub wall and extends vertically below the level of the upper rim, with each track having an upper end terminating adjacent to the upper rim. A cover is comprised of a plurality of elongate, substantially rigid segments each having a longitudinal axis. Each segment is pivotally interconnected in a direction transverse to the longitudinal axis and movably engageable with the drive and with the opposing tracks.