Abstract: A cross-water ski for walking on water having a buoyant member with flaps rotatably attached to its bottom surface and stoppers to prevent movement of the flaps when they reach a position perpendicular to the bottom surface of the buoyant member. The flaps rotate from a low water resistance position when the ski is moved forward along the surface of the water to a perpendicular, high water resistance position when the ski is moved rearward. The cross-water ski also includes a foot piece which releasably locks the user's shoe to the buoyant member but allows the user to repeatedly flex his or her foot as the skis are moved forwardly and rearwardly. In addition, a central fin is provided which is free to move upon contact with obstacles below the surface of the water.