Races in calendar week 41/2005
All motorsport events on the weekend of 14–16 Oct 2005.
| Circuit | Country | Series |
|---|---|---|
| Fontana (oval) |  USA |
|
| Jerez |  Spain |
|
| Kamitsue (Autopolis) |  Japan |
|
| Monterey (Laguna Seca) | USA |
|
| Shanghai |  China |
|
| Viamao (Taruma) |  Brazil |
|