The city of Rock Hill is becoming famous for its amateur sports facilities in everything from soccer to motocross and more. The last week of July will see the city host the BMX (bicycle motocross) world championships, and riders from Australia to France to Brazil will come to South Carolina to add an expected $13 million to the local economy. Prior to that event, however, the city held race for the press to let members of the fourth estate get a feel for what goes into this growing sport.