El Gran Premio de Suecia ha sido cancelado para su edición de 2018 en Uddevala. De este modo, tal y como emite Youthstream en un comunicado, la categoría del Europeo de 125cc y 250cc se quedan sin una de las pruebas previstas para esta temporada, aunque podría buscarse una nueva fecha. De este modo, el calendario queda así:
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2018 FIM MXGP / MX2 MOTOCROSS WORLD CHAMPIONSHIP CALENDAR |
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| DATE | COUNTRY | GRAND PRIX | VENUE |
| 4 March |  |
PATAGONIA – ARGENTINA | Neuquen |
| 18 March |  |
EUROPE (NL) | Valkenswaard |
| 25 March |  |
LA COMUNITAT VALENCIANA (ESP) | Redsand |
| 8 April |  |
TRENTINO (I) | Pietramurata |
| 15 April |  |
PORTUGAL | Agueda |
| 1 May |  |
RUSSIA | Orlyonok |
| 13 May |  |
LATVIA | Kegums |
| 20 May |  |
GERMANY | Teutschenthal |
| 3 June |  |
GREAT BRITAIN | Matterley Basin |
| 10 June |  |
FRANCE | St Jean d’Angély |
| 17 June | |
LOMBARDIA (I) | Ottobiano |
| 1 July |  |
INDONESIA | Pangkal Pinang |
| 8 July | |
ASIA (INDONESIA) | Semarang |
| 22 July |  |
CZECH REPUBLIC | Loket |
| 5 August |  |
BELGIUM | Lommel |
| 19 August |  |
SWITZERLAND | Frauenfeld/Gachnang |
| 2 September |  |
TURKEY | Afyonkarahisar |
| 16 September | |
THE NETHERLANDS | Assen |
| 30 September | |
ITALY | Imola |
 7 October – Monster Energy FIM Motocross of Nations – USA, Red Bud |
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 26 August – FIM JUNIOR MOTOCROSS WORLD CHAMPIONSHIP – Australia, Horsham |
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