After a long and thrilling title fight that began the first full weekend in January, the United States Supercross Championships came to a dramatic conclusion with its 17th and final race on Saturday night in front of a sold out crowd of more than 39,000 inside Sam Boyd Stadium in Las Vegas.

Nine points sat between Team Red Bull KTM Factory Racing’s Ryan Dungey and Monster Energy Kawasaki’s Eli Tomac entering the night, but when the dust settled after a thrilling 450SX class main event it was Dungey who walked away with his fourth title, and his third in a row.

Rockstar Energy Husqvarna Factory Racing’s Jason Anderson took the main event win, his first of the season.

In the 250SX class, a title was on the line for the Eastern Regional Championship in the annual East/West showdown.

After one of the wildest and most memorable races in the history of the division, Monster Energy/Pro Circuit/Kawasaki’s Adam Cianciarulo walked away with the main event win, but it was Rockstar Energy Husqvarna Factory Racing’s Zach Osborne who emerged with his first career title after battling back from a first-turn crash.

Photos courtesy Simon Cudby

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450SX Class Results

1. Jason Anderson, Rio Rancho, N.M., Husqvarna
2. Eli Tomac, Cortez, Colo., Kawasaki
3. Josh Grant, Riverside, Calif., Kawasaki
4. Ryan Dungey, Belle Plaine, Minn., KTM
5. Dean Wilson, Clermont, Fla., Husqvarna
6. Chad Reed, Dade City, Fla., Yamaha
7. Blake Baggett, Grand Terrace, Calif., KTM
8. Davi Millsaps, Cairo, Ga., KTM
9. Justin Brayton, Mint Hill, N.C., Honda
10. Cooper Webb, Newport, N.C., Yamaha

Final 450SX Class Championship Standings

1. Ryan Dungey, Belle Plaine, Minn., KTM – 359
2. Eli Tomac, Cortez, Colo., Kawasaki – 354
3. Marvin Musquin, Corona, Calif., KTM – 293
4. Jason Anderson, Rio Rancho, N.M., Husqvarna – 273
5. Davi Millsaps, Cairo, Ga., KTM – 221
6. Blake Baggett, Grand Terrace, Calif., KTM – 220
7. Cole Seely, Sherman Oaks, Calif., Honda – 212
8. Dean Wilson, Clermont, Fla., Husqvarna – 185
9. Chad Reed, Dade City, Fla., Yamaha – 182
10. Josh Grant, Riverside, Calif., Kawasaki – 175

250SX Class East/West Regional Showdown

1. Adam Cianciarulo, Port Orange, Fla., Kawasaki
2. Justin Hill, Yoncalla, Ore., Kawasaki
3. Aaron Plessinger, Hamilton, Ohio, Yamaha
4. Dylan Ferrandis, Lake Elsinore, Calif., Yamaha
5. Mitchell Oldenburg, Alvord, Texas, KTM
6. Jimmy Decotis, Peabody, Mass., Honda
7. Zach Osborne, Abingdon, Va., Husqvarna
8. Hayden Mellross, Australia, Yamaha
9. Mitchell Harrison, Tallahassee, Fla., Yamaha
10. Cameron McAdoo, Sioux City, Iowa, Honda

Final Eastern Regional 250SX Class Championship Standings

1. Zach Osborne, Abingdon, Va., Husqvarna – 173
2. Adam Cianciarulo, Port Orange, Fla., Kawasaki – 171
3. Joey Savatgy, Thomasville, Ga., Kawasaki – 166
4. Jordon Smith, Belmont, N.C., KTM – 161
5. Dylan Ferrandis, Lake Elsinore, Calif., Yamaha – 144
6. Christian Craig, Corona, Calif., Honda – 97
7. Mitchell Harrison, Brighton, Mich., Yamaha – 86
8. Luke Renzland, Hewitt, N.J., Yamaha – 84
9. Anthony Rodriguez, Cairo, Ga., Yamaha – 82
10. Kyle Cunningham, Willow Park, Texas, Suzuki – 77

Final Western Regional 250SX Class Championship Standings

1. Justin Hill, Yoncalla, Ore., Kawasaki – 202
2. Shane McElrath, Canton, N.C., KTM – 164
3. Aaron Plessinger, Hamilton, Ohio, Yamaha – 163
4. Martin Davalos, Clermont, Fla., Husqvarna – 145
5. Jimmy Decotis, Peabody, Mass., Honda – 137
6. Austin Forkner, Richards, Mo., Kawasaki – 114
7. Dan Reardon, Menifee, Calif., Yamaha – 104
8. Kyle Chisholm, Valrico, Fla., Honda – 90
9. Cole Martinez, Rimrock, Ariz., Yamaha – 77
10. Mitchell Oldenburg, Alvord, Texas, KTM – 76