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. The privately owned company was founded by Bill France Sr. in 1948, and hi ...
national series in 2010:
National series
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2010 NASCAR Sprint Cup Series
The 2010 NASCAR Sprint Cup Series was the 62nd season of Sprint Cup Series, professional stock car racing in the United States, the 39th modern-era cup series, and the first Cup season of the 2010s, the 21st century's second decade. Beginning ...
– The top racing series in NASCAR
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2010 NASCAR Nationwide Series – The second-highest racing series in NASCAR
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2010 NASCAR Camping World Truck Series – The third-highest racing series in NASCAR
Regional series
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2010 NASCAR Canadian Tire Series – Canadian regional series
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2010 NASCAR Corona Series – Premiere NASCAR Mexico series
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2010 NASCAR Mini Stock Series –Secondary NASCAR Mexico series
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NASCAR seasons