Xtream Rock Island Grand Prix plans 29th annual race Aug. 31-Sept. 1, 2024 Xtream Rock Island Grand Prix plans 29th annual race Aug. 31-Sept. 1, 2024 Bas Kaligis / Monday, November 27, 2023 0 509 Article rating: No rating Planning is underway for the 29th running of the Xtream Rock Island Grand Prix kart races, the Saturday and Sunday of Labor Day weekend, Aug. 31-Sept. 1, 2024. Read more