BMX Supercross made its debut as an Olympic medal sport in Beijing in 2008, with American Mike Day grabbing gold and Donny Robinson and Jill Kintner each bringing home bronze medals. All three trained on the ABA-sanctioned track at Pikes Peak BMX, which boasts a replica of the Beijing Olympic track. To start training for London 2012 — or to watch the thrills and spills from the stands — check out the weekly races featuring everything from first-timer's races for kids to serious amateur and pro showdowns.