Races in calendar week 16/2004
All motorsport events on the weekend of 16–18 Apr 2004.
| Circuit | Country | Series |
|---|---|---|
| Hockenheim |  Germany |
|
| Long Beach |  USA |
|
| Motegi (oval) |  Japan |
|
| Narellan (Oran Park) |  Australia |
|
| Sao Paulo |  Brazil |
|
| Silverstone |  Great Britain |
|
| Valencia (Cheste) |  Spain |
|