Abstract: A supplemental support assembly is provided for supporting a collapsible shelter structure, such as a ground blind for hunting. The support assembly includes a pole having one end coupled with a framework of the shelter structure, and a ground engaging point at the other end. In one embodiment, the pole is coupled with the framework by a coupler attached to the end of the pole that fits over a central hub of the framework. In another embodiment, the pole is coupled with the framework by a threaded member that extends downwardly from the central hub and mates with a threaded end of the pole. The threaded member can be formed integral with the central hub or affixed to the central hub as a separate component. The support assembly prevents the shelter structure from collapsing under heavy external loads.