Abstract: A tubular portion is embedded vertically into the ground and has a screw threaded upper end substantially flush with the surface of the ground. A screw threaded stem or post detachably engages the upper end when a trailer is to be parked thereon, and the stem is provided with the ball portion of a trailer coupler assembly on the upper end thereof engageable by the coupler portion of the trailer coupler assembly situated on the front end of the hitch frame. A padlock through the release lever prevents unauthorized removal of the trailer from the post and the post can be unscrewed and stored when the trailer is not parked at the post assembly.