Fairfax, VA ­- The United States Grand Prix Racers Union announces the 2011 calendar of events for the National Championship Series. April 2-3 Jennings GP April 16-17 Chuckwalla May 28-29 Summit Point June 4-5 Thunderhill July 9-10 Roebling Road July 16-17 Miller (West) Aug 13-14 NJMP (Thunderbolt) Aug 20-21 PIR Sept 17-18 INDE Motorsports Ranch Sept 24-25 VIR Oct 8-9 Putnam Park (Finale) About USGPRU The USGPRU is the officially recognized 125 Grand Prix National Championship® and 250 Grand Prix National Championship® series. The popular Moriwaki MD250H spec-bike youth class and the exciting new Moto3 classes round out a real GP experience. The USGPRU provides a unique opportunity for riders by providing extended length grand prix racing with timed qualifying and superb contingency and sponsor support. Race and practice format is designed to prepare riders for the experience of 2-wheel racing at the highest levels.