State Pre-Race Double and State Final Triple. Winnebagoland BMX Club of Oshkosh, Wisconsin, is a sanctioned USA BMX track that provides a safe, sanctioned place for your kids to exercise, socialize, and develop skills that will be useful throughout their lives. BMX is a family sport that offers something for every level of rider. In BMX racing, NOBODY SITS ON THE BENCH! Age groups range from 2 years and up and have different skill levels per age group, so that your rider races people with the same or similar skill levels as themselves.