Races in calendar week 25/2006
All motorsport events on the weekend of 23–25 Jun 2006.
| Circuit | Country | Series |
|---|---|---|
| Cleveland |  USA |
|
| Estoril |  Portugal |
|
| Lexington | USA |
|
| Mallala |  Australia |
|
| Mondello Park |  Ireland |
|
| Montreal |  Canada |
|
| Richmond (oval) | USA |
|
| Sepang |  Malaysia |
|
| Vallelunga |  Italy |
|