Round two contested for California ProKart Challenge Round two contested for California ProKart Challenge Back-to-back events in Buttonwillow for Superkarts! USA regional championship Bas Kaligis / Sunday, May 29, 2022 0 1073 Article rating: No rating The California ProKart Challenge completed the second round of the 2022 season over the May 14-15 weekend at the Buttonwillow Raceway Park. It was the second straight event at the central California facility, with the opening event contested there in April. This time it would be in the clockwise direction around the 7/10-mile circuit. Another chunk of the $70,000 prize package for this season was awarded following the two days of action at Buttonwillow – with all but two drivers earning their first wins of the series this year. Read more