The tournament will be called the BMW Championship beginning in 2007 when it switches from July to September and becomes part of a new championship points race.
This year's Cialis Western Open will be played next month at Cog Hill Golf Club in Lemont, Ill., its home since 1991. Cog Hill also will host the 2007 tournament under its new name.
Under the six-year agreement announced Monday involving BMW, the PGA TOUR and the Western Golf Association, the tournament will begin rotating locales in 2008.
The event will be played in St. Louis at Bellerive Country Club in 2008, return to Chicago in 2009 and every second year thereafter. It will go to Crooked Stick Golf Club outside Indianapolis in 2010 and to an undetermined site in 2012.
The Western Golf Association has run the tournament since 1899.