Eli Tomac has extended his championship lead at round thirteen of the Monster Energy Supercross season with his seventh win of the season at Rice Eccles Stadium, Utah, while Chase Sexton took victory in the 250SX East class to regain the championship lead.
Track conditions had deteriorated throughout the day as the 450SX main event for round thirteen of the AMA monster Energy Supercross Championship fired out the gate with Zach Osborne taking the holeshot in a sloppy and chaotic first corner. Red Bull KTM Racing's Cooper Webb, Eli Tomac, Jason Anderson and HRC Honda's Ken Roczen formed a freight train behind.
It only took a lap for Webb to get by Osborne while Tomac made the move a few turns later and moved into second. While Webb and Tomac stretched their lead championship contender, Roczen was having a hard time getting by Osborne and losing time. To make matters worse for Roczen Anderson demoted him to fifth with fifteen minutes still to run.
By the halfway mark Tomac had made his way to the rear wheel of Webb before the Monster Energy Kawasaki rider made the move into the lead with a good run through the whoops. Anderson also got the better of his Rockstar Energy Husqvarna team-mate to move into third and a podium position. Meanwhile, Roczen's day was getting worse as Malcolm Stewart demoted him to sixth and thirty-seven seconds off the lead.