Multiple sweeps at round two for California ProKart Challenge Multiple sweeps at round two for California ProKart Challenge Repeat and first time winners highlight second stop at Buttonwillow Raceway Park Bas Kaligis / Thursday, April 25, 2024 0 623 Article rating: No rating The second event of the 2024 California ProKart Challenge was contested on the April 20-21 weekend with the series returning to the Buttonwillow Raceway Park. Running the Buttonwillow, California circuit in the reverse direction from the opening round event in March, the Superkarts! USA regional program hosted Round Two of the six-round championship program for the eight categories competing. This time around featured a handful of repeat winners while others stood on the podium for the first time in 2024. Read more