Closing out the 2013 AMA Pro Flat Track presented by J&P Cycles season with a bang, the top dirt track racing talent in the world converged on the LA County Fairplex for the Pomona Half-Mile on October 12, 2013. With the Grand National Championship Championship undecided heading into the night's main event, the Expert riders mounted their twin-cylinder motorcycles for the final time and put on a spectacular show for the California fans. Brad Baker started from pole position on his twin-cylinder Harley-Davidson and was joined on the front row by Kenny Coolbeth, Jr., Bryan Smith, Sammy Halbert, Briar Bauman and Jared Mees. A total of five manufacturers were represented on the grid: Harley-Davidson, Kawasaki, Suzuki, Ducati and Triumph. And -- perhaps more impressive -- when the dust settled and the 25-lap main event ended, three different manufacturers made it to the podium. Watch now to see how the battle unfolded and to find out which Grand National Champion was crowned in California.