NEW PRO RACE CIRCUIT SET

October 1974 - Green Bay, Wisconsin - Press Release
Four companies, including three snowmobile manufacturers and an accessory manufacturer, have thus far committed to a new factory racing circuit for the coming season to replace the defunct SnoPro circuit.
   The new circuit will be called the Professional Drivers Circuit (PDC) and the factory teams participating will follow it on an honor system over a thirteen race schedule according to guidelines established jointly by the factories, the racers, and the United States Snowmobile Association.  (USSA).