Abstract: A tethering system (20) for an animal (502) includes a ground station (22) which is suitable for insertion into the ground (500). The ground station has an upwardly opening cavity (23). A portable pin (32) is shaped and dimensioned to be rotatably received by the cavity of the ground station. Pin (32) has a tether connector (34) at one end, so that when the pin is inserted into the ground station, the pin and tether connector may swivel 360°. In a preferred embodiment, a plurality of ground stations are installed in the ground, and the pin is sequentially moved from one ground station to another ground station as desired to provide a new area for the animal.