The ProMX Motocross Championship (known for sponsorship reasons as the Penrite ProMX Motocross Championship), is the premier Australian Motocross series, sanctioned by Motorcycling Australia. The series runs throughout autumn and winter, before the Supercross stadium series in spring, and features three classes; the premier class MX1, MX2, and MX3, which also features junior riders.[1] An MXW class for women is also part of the series.