Abstract: A covered arena structure capable of being erected or dismantled for transport from site-to-site comprises an interior portal frame structure comprising a series of inwardly inclined side members supporting an interior roof structure around the periphery thereof so as to define a substantially unobstructed arena area; a weatherproof membrane covering the interior portal frame structure and being draped over the inwardly inclined side members; an exterior pyramidal frame structure outside the membrane; and suspension means connected between the pyramidal structure and the membrane so as to suspend a portion of the membrane located above the interior roof structure.