Abstract: An open-backed towable watercraft (towcraft) which is maneuverable from side-to-side by the intuitive leaning action of one or more riders thereon. The towcraft consists of a partial hull structure, upwardly curved at the bow end with a predominantly flat bottom and stern; and, an inflated, or other cushioned, upper portion which is fitted with handles for the riders to securely grasp. At least three downward-projecting fins are removably attached to the partial hull structure. A first fin of sufficient size and draft is ventrally located along the craft's centerline, at its front. A second and third fin, smaller in size and draft to the ventral fin, are laterally spaced-apart, preferably, at a station aft of the craft's center of gravity.