AMA/Gene Romero Grand National Flat Track Championship is ON for Saturday, Oct. 24 in the Grandstand infield. This is the deciding race for AMA Champion and it’s the first time in 10 years that AMA’s Pro Grand National Twin Flat Track Series has come to So Cal. Buy tickets online, at local Harley dealerships or the Fairplex box office on the 24th. Gates open and practice starts at 3:30 p.m.; first race at 6:30 p.m. Admission $10-$40; ages 5 and under free.