Final Winners of 2025 Decided at ProKart Challenge Final Winners of 2025 Decided at ProKart Challenge Round Six action contested at K1 Circuit for last event of season for Superkarts! USA regional program Bas Kaligis / Thursday, October 16, 2025 0 108 Article rating: No rating The 2025 season concluded for the ProKart Challenge following the action on October 11-12 at the K1 Circuit. The Winchester, California, facility welcomed the Superkarts! USA regional program to close out its 21st season. A total of 161 entries battled around the 1.1-mile ‘Pro Track’ course for the sixth and final round of the 2025 championship. Read more