California ProKart Challenge begins 19th season next weekend California ProKart Challenge begins 19th season next weekend Flagship Superkarts! USA regional program to kick off 2023 championship at Buttonwillow Bas Kaligis / Friday, March 3, 2023 0 554 Article rating: No rating The 2023 California ProKart Challenge will begin on the March 11-12 weekend at Buttonwillow Raceway Park. The 19th season of the Superkarts! USA regional program visits the California facility for the first round of the six-round championship series. The race will be the first major event within the state on the season, with big numbers anticipated for the two-day event. Read more