A snow mobility device that defines a longitudinal axis, the snow mobility device having a generally planar deck with a top surface and a bottom surface, the deck defining a front portion, a rear portion, a middle portion, and outer edges. The middle portion is generally flat and the front and rear portions are each curved upwardly. The edges are rounded. There are at least two rails extending outwardly from the bottom surface along all of the middle portion and at least some of each of the front and rear portions of the deck, the rails spaced from one another and essentially parallel to the longitudinal axis of the snow mobility device.