There were three

NASCAR The National Association for Stock Car Auto Racing, LLC (NASCAR) is an American auto racing sanctioning and operating company that is best known for stock car racing. It is considered to be one of the top ranked motorsports organizations in ...

national series in 2010:

National series

* 2010 NASCAR Sprint Cup Series – The top racing series in NASCAR * 2010 NASCAR Nationwide Series – The second-highest racing series in NASCAR * 2010 NASCAR Camping World Truck Series – The third-highest racing series in NASCAR

Regional series

* 2010 NASCAR Canadian Tire Series – Canadian regional series * 2010 NASCAR Corona Series – Premiere NASCAR Mexico series * 2010 NASCAR Mini Stock Series –Secondary NASCAR Mexico series {{s-end NASCAR seasons