Tomac went on to qualify through the LCQ easily taking a 14 second win over Kyle Chisholm.
When the gate dropped on the main event Ken Roczen made an impressive start from the outside after a having a bad gate pick to take the holeshot over the KTM duo of Marvin Musquin and Blake Baggett. Defending champion Jason Anderson was back in the mix running 4th on the opening lap. Heavy hitters Tomac, Barcia, Webb, Wilson, heat two winner Brayton and Chad Reed all ran mid-pack.
Anderson was riding with a renewed fervour and quickly passed Musquin to move into second.
Lap five saw Malcolm Stewart crash heavily out of the race after a mistake filled night, with Stewart needing trackside medical attention the race was red flagged with thirteen minutes remaining.
After a lengthy delay, riders lined up line astern for a single file re-start with Ken Roczen leading the field through the first turn.
Anderson took full advantage of the re-start, locking on to Roczen's rear wheel before making an aggressive pass for the lead that left Roczen's bike on the ground, with German re-mounting in fourth position.
Anderson built himself a comfortable lead of over two seconds, from Baggett, however Baggett was not done and with just a handful of laps remaining caught Anderson before making a clean pass around the outside of the 2018 champion, and quickly built an unbeatable lead, crossing the finish line to take his maiden 450 Supercross win.
"To be able to feel good enough to run behind Jason, ahh, I have had weekends where I have had to run the pace with those guys, Kenny as well, then some weekends they leave me in the dust, so it feels good to finally get my whole program together and win a round against those guys." Baggett commented from the podium
Anderson held on for a second place finish, while Roczen was able to catch and pass Musquin to round out the podium and in the process take the championship lead by a single point ahead of round one winner, Justin Barcia who finished the night back in sixth position.
Tomac, who made the main event via the LCQ was also able to make a late race pass on Musquin to finish in 4th with the French rider being regulated to 5th.
Brayton had to settle for a 7th place finish after his heat race win, crossing the line ahead of Dean Wilson in 8th, Cole Seely in 9th and Cooper Webb rounding out the top ten.
After showing tremendous speed to finish second in his heat race, the Reed was not able to replicate the magic in the main event finishing the race in 14th position.