Grand Prix of Portland ended in 2007.
Portland Grand Prix was created in 1978.
Grand Prix of Portland was created in 1984.
The duration of Grand Prix of Portland is 1.75 hours.
Tripoli Grand Prix ended in 1940.
Prost Grand Prix ended in 2002.
Taipei Grand Prix ended in 1992.
Grand Prix of Sonoma ended in 2008.
Stewart Grand Prix ended in 1999.
Malta Grand Prix ended in 2001.
Cologne Grand Prix ended in 1986.
Grand Prix Masters ended in 2007.