Grands Prix
| Round | Date | Grand Prix | Circuit | 125cc winner | 250cc winner | MotoGP winner | Report |
|---|---|---|---|---|---|---|---|
| 1 | April 18 | South African Grand Prix | Phakisa | Andrea Dovizioso | Dani Pedrosa | Valentino Rossi | Report |
| 2 | May 2 | Spanish Grand Prix | Jerez | Marco Simoncelli | Roberto Rolfo | Sete Gibernau | Report |
| 3 | May 16 | French Grand Prix | Le Mans | Andrea Dovizioso | Dani Pedrosa | Sete Gibernau | Report |
| 4 | June 6 | Italian Grand Prix | Mugello | Roberto Locatelli | Sebastián Porto | Valentino Rossi | Report |
| 5 | June 13 | Catalan Grand Prix | Catalunya | Héctor Barberá | Randy de Puniet | Valentino Rossi | Report |
| 6 | June 26 | Dutch TT | Assen | Jorge Lorenzo | Sebastián Porto | Valentino Rossi | Report |
| 7 | July 4 | Rio de Janeiro Grand Prix | Rio de Janeiro | Héctor Barberá | Manuel Poggiali | Makoto Tamada | Report |
| 8 | July 18 | German Grand Prix | Sachsenring | Roberto Locatelli | Dani Pedrosa | Max Biaggi | Report |
| 9 | July 25 | British Grand Prix | Donington Park | Andrea Dovizioso | Dani Pedrosa | Valentino Rossi | Report |
| 10 | August 22 | Czech Republic Grand Prix | Brno | Jorge Lorenzo | Sebastián Porto | Sete Gibernau | Report |
| 11 | September 5 | Portuguese Grand Prix | Estoril | Héctor Barberá | Toni Elías | Valentino Rossi | Report |
| 12 | September 18 | Japanese Grand Prix | Motegi | Andrea Dovizioso | Dani Pedrosa | Makoto Tamada | Report |
| 13 | October 2 | Qatar Grand Prix | Losail | Jorge Lorenzo | Sebastián Porto | Sete Gibernau | Report |
| 14 | October 10 | Malaysian Grand Prix | Sepang | Casey Stoner | Dani Pedrosa | Valentino Rossi | Report |
| 15 | October 17 | Australian Grand Prix | Phillip Island | Andrea Dovizioso | Sebastián Porto | Valentino Rossi | Report |
| 16 | October 31 | Valencian Grand Prix | Valencia | Héctor Barberá | Dani Pedrosa | Valentino Rossi | Report |
Read more about this topic: 2004 Grand Prix Motorcycle Racing Season