King Of Concrete is a National Level Bowl Competition for Skateboarding sanctioned by the Australian Skateboard Federation. Held all over Australia, as the peak series KOC brings participants, sponsors and support crew to the vicinity, and is a spectacle for local non-skaters, and a stage for local skaters to show their ability and earn Australian rankings points. It is in the age groups of 9 and Under, 12 and Under, 16 and Under, Masters, Open Men and Open Women. Hosted by former World Champ and Olympic skateboarding judge, Renton Millar.