Championships to be decided next weekend for ProKart Challenge Championships to be decided next weekend for ProKart Challenge Series finale heads to K1 Circuit for Superkarts! USA regional program Bas Kaligis / Sunday, September 27, 2026 0 59 Article rating: No rating The 2026 season for the ProKart Challenge program is set to close out over the October 3-4 weekend, hosting the fifth and final event of the year. The sixth round of the Superkarts! USA regional championship is heading to the K1 Circuit in Winchester, California. The layout for the weekend will feature the ‘Pro Track with Chicanes’, providing a different challenge from the opening double-round weekend that kicked off the 2026 schedule back in April. Read more