A mount device is disclosed for securing a swimming starting block to a floor. In at least one embodiment, the mount device provides an upper mount conduit engagable with the starting block and sized for at least partially extending into a receiver conduit in the floor. A lower mount conduit is positioned below the upper mount conduit and has an outer diameter or width sized for being completely positioned within the receiver conduit. An expansion bolt extends through respective substantially coaxially aligned bores of each of the upper mount conduit and the lower mount conduit, each of the bores having a diameter that is relatively larger than a diameter the bolt. Upon tightening the expansion bolt, the lower mount conduit is urged along an angled common axis toward the upper mount conduit, such that opposing long outside surfaces of the upper mount conduit and lower mount conduit are urged in opposite, substantially horizontal directions, creating a frictional engagement within the receiver conduit.