Wow! This is way cool. Mark Hartman just sent me the program from the 1964 Dirt Diggers Grand Prix (aka Hopetown or Corriganville). This was a seminal race in the history of American motocross. This race pre-dated the Edison Dye Inter-Am races and this event grew to become one of the biggest motorcycle races on the West Coast. Thanks Mark for saving this for 60 years, scanning it and sending. I’m happy to share this wonderful piece of racing history. Enjoy!