California Prokart Challenge gearing up to close out 2019 Season California Prokart Challenge gearing up to close out 2019 Season Bas Kaligis / Sunday, September 1, 2019 0 7700 Article rating: No rating Round Five of Superkarts! USA flagship regional program set for September 7-8 in Santa Maria. The California ProKart Challenge has the two final events of the 2019 season in sight for the month of September. The penultimate round for the Superkarts! USA regional program has teams and competitors heading to the Santa Maria Kart Track on September 7-8. The fifth round of the California PKC championship chase is set for the ‘Nationals Configuration’ of the Santa Maria, California facility. Read more