The present invention relates to a novel design for a lightweight, portable D shaped circular dog run that is adapted for quick and simple attachment to a plethora of different diameter vertical stanchions including but not limited to posts, trees, pillars, poles and the like. It has a simple configuration wherein its distal end is insert able within its proximal end to an adjustable depth and then pinned therein, so as to create a continuous ring with a central void that accepts a spherical end of a track sphere. The track sphere rotates around the D shaped run within its central void and having a linear member extending normally therefrom with a lead ring on its end that the leash of the pet can be affixed to.
