Calendario
| # | Start Date | Race title | Circuit | Vincitore |
|---|---|---|---|---|
| 1 | 06.01.2018 | Anaheim | Angel Stadium | M. Musquin |
| 2 | 13.01.2018 | Houston | NRG Stadium | J. Anderson |
| 3 | 20.01.2018 | Anaheim | Angel Stadium | E. Tomac |
| 4 | 27.01.2018 | Glendale | UOP Stadium | E. Tomac |
| 5 | 03.02.2018 | Oakland | Oak-Alameda Stadium | J. Anderson |
| 6 | 10.02.2018 | San Diego | Petco Park | J. Anderson |
| 7 | 17.02.2018 | Arlington | AT&T Stadium | E. Tomac |
| 8 | 24.02.2018 | Tampa | Raymond James Stadium | E. Tomac |
| 9 | 03.03.2018 | Atlanta | Mercedes-Benz Stadium | J. Anderson |
| 10 | 10.03.2018 | Daytona | Daytona | J. Brayton |
| 11 | 17.03.2018 | St. Louis | Dome of America's Center | E. Tomac |
| 12 | 24.03.2018 | Indianapolis | Lucas Oil Stadium | M. Musquin |
| 13 | 07.04.2018 | Seattle | Century Link Field | E. Tomac |
| 14 | 14.04.2018 | Minneapolis | U.S. Bank Stadium | E. Tomac |
| 15 | 21.04.2018 | Foxborough | Gillette Stadium | M. Musquin |
| 16 | 28.04.2018 | Salt Lake City | Rice-Eccles Stadium | M. Musquin |
| 17 | 05.05.2018 | Las Vegas | Sam Boyd Stadium | E. Tomac |
Standings
| # | Driver | Squadra | PU | Wins | Podiums | RWP |
|---|---|---|---|---|---|---|
| 1 | J. Anderson | Husqvarna | 356 | 4 | 10 | 17 |
| 2 | M. Musquin | KTM | 347 | 5 | 12 | 16 |
| 3 | E. Tomac | Kawasaki | 318 | 7 | 12 | 16 |
| 4 | B. Baggett | KTM | 285 | 0 | 5 | 17 |
| 5 | J. Brayton | Honda | 275 | 1 | 2 | 17 |
| 6 | W. Peick | Suzuki | 251 | 0 | 0 | 17 |
| 7 | D. Wilson | Husqvarna | 208 | 0 | 1 | 15 |
| 8 | B. Tickle | KTM | 184 | 0 | 0 | 13 |
| 9 | C. Webb | Yamaha | 181 | 0 | 2 | 13 |
| 10 | J. Barcia | Yamaha | 177 | 0 | 3 | 10 |
| 11 | M. Stewart | Suzuki | 169 | 0 | 0 | 16 |
| 12 | V. Friese | Honda | 168 | 0 | 0 | 17 |
| 13 | C. Reed | Husqvarna | 159 | 0 | 0 | 17 |
| 14 | T. Bowers | Kawasaki | 149 | 0 | 0 | 16 |
| 15 | B. Bloss | KTM | 140 | 0 | 0 | 14 |
| 16 | C. Craig | Honda | 134 | 0 | 0 | 9 |
| 17 | C. Seely | Honda | 124 | 0 | 1 | 7 |
| 18 | K. Roczen | Honda | 102 | 0 | 3 | 6 |
| 19 | K. Cunningham | Suzuki | 99 | 0 | 0 | 15 |
| 20 | J. Grant | Kawasaki | 83 | 0 | 0 | 6 |
| 21 | B. Lamay | Honda | 71 | 0 | 0 | 13 |
| 22 | C. Soubeyras | Suzuki | 65 | 0 | 0 | 9 |
| 23 | K. Chisholm | Yamaha | 48 | 0 | 0 | 5 |
| 24 | J. Martin | Honda | 36 | 0 | 0 | 3 |
| 25 | A. Ray | Yamaha | 36 | 0 | 0 | 8 |
| 26 | H. Miller | Suzuki | 29 | 0 | 0 | 6 |
| 27 | D. Tedder | KTM | 26 | 0 | 0 | 8 |
| 28 | C. Martinez | Husqvarna | 20 | 0 | 0 | 3 |
| 29 | A. Enticknap | Honda | 19 | 0 | 0 | 5 |
| 30 | J. Hill | Yamaha | 18 | 0 | 0 | 2 |
| 31 | A. Politelli | Honda | 18 | 0 | 0 | 5 |
| 32 | M. Bisceglia | Suzuki | 15 | 0 | 0 | 4 |
| 33 | J. Hill | Yamaha | 13 | 0 | 0 | 3 |
| 34 | A. J. Catanzaro | Kawasaki | 13 | 0 | 0 | 4 |
| 35 | J. Bogle | Suzuki | 12 | 0 | 0 | 2 |
| 36 | B. Scharer | Yamaha | 9 | 0 | 0 | 2 |
| 37 | D. Merriam | Yamaha | 9 | 0 | 0 | 2 |
| 38 | C. Vanbuskirk | KTM | 8 | 0 | 0 | 2 |
| 39 | D. Raper | Kawasaki | 6 | 0 | 0 | 2 |
| 40 | J. Weimer | Honda | 5 | 0 | 0 | 1 |
| 41 | B. Taft | Yamaha | 5 | 0 | 0 | 1 |
| 42 | C. Autenrieth | KTM | 5 | 0 | 0 | 1 |
| 43 | J. Starling | Husqvarna | 5 | 0 | 0 | 1 |
| 44 | S. Champion | Yamaha | 5 | 0 | 0 | 2 |
| 45 | C. Gardner | Honda | 5 | 0 | 0 | 2 |
| 46 | C. Jurin | Kawasaki | 4 | 0 | 0 | 1 |
| 47 | T. Pauli | Kawasaki | 3 | 0 | 0 | 1 |
| 48 | D. Pipes | Suzuki | 2 | 0 | 0 | 1 |
| 49 | N. Schmidt | Suzuki | 1 | 0 | 0 | 1 |