The invention relates to an anchoring device for boundary poles and gate poles for skiing, comprising a core (6) to be fastened to an end of a pole (2) and anchoring elements (16). According to the invention, the anchoring device comprises a head (7, 107) that merges at the end of the core (6) and a dowel (100) that comprises a tubular body, which is arranged between the head (7, 107) and the fastening of the pole (2) in such a way that the tubular body can be spread by means of a lifting unit, comprising a cam (9, 114) that is alternately provided on the core or on the spreading body in such a way that the spreading body is moved relative to the core.