America with Tim Ferry, Ryan Villapoto, and Ricky Carmichael
I don't know that it is the most important race ever, but what stands out in my mind is the 1981 Motocross DES Nations where Team USA won completely unexpectedly and brought on a 13 year domination of the MX Des Nations by a country, up til then, considered to be inferior in motocross. daytona supercross is always the best race and atlanta 2009 supercross is the best race in history
United states of america
The All Blacks (New Zeeland)
Le Mozart des Pickpockets (The Mozart of Pickpockets) won the Oscar for Short Film - Live Action - in 2007.
a bmx bike
Ryan Villipoto is a famous motocross racer who won the 2011 title and many many more titles