Eli Tomac needed just one point to clinch the 2018 Lucas Oil Pro Motocross Championship series and he got 12.

The Ironman National turned muddy giving riders difficult conditions for the second time in three weeks but like usual it had little effect on the top riders. Tomac finished second in Moto 1 behind Justin Barcia who got the win, then won again, altogether claiming his first Moto win and first overall since 2015 and his first career sweep. Marvin Musquin finished fourth in Moto 1 falling 24 points behind Tomac for the title chase leaving everything to chance for Moto 2.

Tomac clicked on cruise control finishing ninth as Musquin took third and Tomac raised the 2018 Motocross Championship trophy for the second year in a row. Ken Roczen took second overall and finished in third for the season just a point ahead of Barcia. Musquin rounded out the Ironman podium.

In the 250 class, already crowned Champion Aaron Plessinger took the overall on his fifth sweep of the year planting an exclamation point on his 2018 season. Plessinger moves to the 450 class next year after winning his first Outdoor Championship and 250 class Supercross Championship. RJ Hampshire finished second overall and moved into fourth-place for the season while Chase Sexton rounded out the podium in third. Alex Martin took 10th overall at Ironman finishing in second for the season and rookie Justin Cooper held on to third for the season finishing fifth overall.

Check out the Top 21 Best Photos at Ironman starting with the 450 class Championship celebration at top:

Aaron Plessinger capped off his 250 class Championship by winning the final round

Justin Barcia finding the right angle

Dylan Ferrandis waits for AAA

Chad Reed (#22) raced a National for the first time since 2015, got a holeshot and finished eighth overall

Shane McElrath stayed out of the mud for as long as possible and...

Probably won't ever wear yellow again

Justin Barcia's face says it all

Eli Tomac powered his way all season to the 2018 Motocross Championship

Alex Martin worked his way through the mud to a 10th overall finish

Eli Tomac raises the 2018 Championship Helmet

Justin Cooper rides a mountain of chocolate

Go ahead and hang on to that #1 plate, you will need it for next year

RJ Hampshire (left) and Chase Sexton (right) finished second and third overall, respectively


Eli Tomac celebrates his second straight 450 class Championship

Justin Cooper was one of a few riders who wore a rain jacket

Jason Anderson struggled a bit in the mud

RJ Hampshire hung on for the holeshot and finished the last four Motos with this line: 2-1-4-3

Ken Roczen's impressive second half of the year got him into third-place for the season

Eli Tomac (left) and Marvin Musquin (right) - friends till the end