The fourth round of the Transworld MX/Muscle Milk series was held at Milestone MX. The Milestone track is full of jumps along with a few sections of whoops that make for a challenging but very fun layout.

The second round of the Winter Cup thundered through Cahuilla Creek MX following a quick SoCal winter rain the previous day. The track was in epic conditions to start out the day, but as the races clicked off the soft ground formed up deep ruts and lots of rough chop through the racing surface.

The new Transworld Motocross/Muscle Milk racing kicked off their first series at Perris Raceway with the opening round of the 2012 Winter Cup. Strong breezes greeted the racers throughout the day but had no effect on the racing action.