Races in calendar week 13/2005

All motorsport events on the weekend of 1–3 Apr 2005.

Circuit	Country	Series
Donington Park	Great Britain	Race results available (full) British Formula 3 Championship 2005
Fontana	USA	Race results available (full) Grand-Am Sports Car Series 2005
Manama	Bahrain	Race results available (full) FIA Formula 1 World Championship 2005 Race results available (full) Porsche Supercup 2005
Motegi	Japan	Race results available (full) Formula Nippon 2005 Race results available (full) All-Japan Formula 3 Championship 2005
St.Petersburg	USA	Race results available (full) IRL IndyCar Series 2005 Race results available (full) IRL Infiniti Pro Series 2005