2021 California ProKart Challenge finale set for calspeed 2021 California ProKart Challenge finale set for calspeed Superkarts! USA regional program returns to Fontana for sixth and final round of season Bas Kaligis / Friday, September 24, 2021 0 1025 Article rating: No rating The 2021 season for the California ProKart Challenge is set to close out next weekend (October 2-3) at the CalSpeed Karting facility. The Fontana, California circuit outside the Auto Club Speedway is hosting the sixth and final round of the championship chase. The program contested a double-round weekend here back in June, with this single-round event set to battle around the ‘Classico’ layout in the counter-clockwise direction. Action in Fontana will be the final step of the 2021 championship program, with drivers taking the best five of six rounds toward the final standings. Read more