Question: The 2004 German Grand Prix was held at the circuit in what valley?

Context paragraphs:
2012 German Grand Prix: The 2012 German Grand Prix, formally the Formula 1 Großer Preis Santander von Deutschland, was a Formula One motor race that took place on 22 July 2012 as the tenth round of the 2012 season.  After being held at the Nürburgring in , the race returned to the Hockenheimring in Baden-Württemberg, making the 2012 race the thirty-third time the circuit hosted the German Grand Prix, and the eighth time the shortened circuit hosted the race since its 2002 redesign.

Buenos Aires Grand Prix (motor racing): The Buenos Aires Grand Prix was a motor race held in Buenos Aires, Argentina.  The event was first held at the Costanera circuit from the early 1930s until 1936 and then continued in 1941 at the Retiro circuit.  After a six-year break and General Juan Peron in office, racing resumed at Retiro in 1947 with the start of the South American "Temporada" Grand Prix series to be contested twice a year under Formula Libre regulations.  Italian Luigi Villoresi won all 1947 Temporada events.  The race regularly attracted Brazilian and European drivers and also Argentine drivers such as Juan Manuel Fangio and José Froilán González were now competing in Europe on a regular basis.  For the 1948 Grand Prix season, the race was moved to the Palermo circuit where it would remain to host six of twelve "Peron Cup" races until the end of 1950.  In 1951, the Costanera Norte circuit would host its last three Grand Prix events before the 1951 completion of the Autodromo 17 de Octubre (October 17), a purpose-built circuit for major Grand Prix series which would host various editions of the Buenos Aires Grand Prix from 1952 until 2009 with the exception of the 1956 event held at the General San Martin circuit in Mendoza.

1961 German Grand Prix: The 1961 German Grand Prix was the 23rd time the German Grand Prix (or Grosser Preis von Deutschland) motor race was held.  The race also held the honorary designation of the 21st European Grand Prix.  It was run to Formula One regulations as race 6 of 8 in both the 1961 World Championship of Drivers and the 1961 International Cup for Formula One Manufacturers It was held on 6 August 1961 over 15 laps of the giant 14.2 mile Nürburgring Nordschleife circuit for a race distance of almost 213 miles.  The race also celebrated the 100th race since the establishment of the World Championship in 1950.

2004 German Grand Prix: The 2004 German Grand Prix was a Formula One motor race held on 25 July 2004 at the Hockenheimring.  Jenson Button overcame a 10-place penalty to finish 2nd.  This proved to be Cristiano da Matta's final Grand Prix; for Hungary he was replaced by compatriot Ricardo Zonta.

Klenk: The Klenk-Meteor was a racing car which competed in the 1954 German Grand Prix.  The car was based on the established German marque of Veritas which was active between 1948 and 1953.  Veritas is chiefly remembered as a manufacturer of sports cars and successful Formula Two racing cars.  The company closed when its founder, Ernst Loof, became ill.  He subsequently died in 1956.  The Klenk-Meteor entered for the 1954 German Grand Prix was essentially a Veritas Formula Two car.  The car was owned and prepared by the noted German racing driver Hans Klenk who intended to race it himself in the Grand Prix.  However, Klenk's career as a racing driver came to an end when he suffered injuries in an accident while working as a test driver for Mercedes-Benz.  The car was driven in the Grand Prix by another German, Theo Helfrich.  He retired on lap 9 with engine failure.

1990 German Grand Prix: The 1990 German Grand Prix was a Formula One motor race held at Hockenheimring on 29 July 1990.  It was the ninth round of the 1990 Formula One season.  The race was the 52nd German Grand Prix and the 14th to be held at the Hockenheimring.  It was the 39th and last Formula One Grand Prix to be held in West Germany prior to its re-unification with East Germany.  The race was held over 45 laps of the seven kilometre circuit for a race distance of 306 kilometres.

1959 German Grand Prix: The 1959 German Grand Prix was a Formula One motor race held at the Automobil-Verkehrs- und Übungs-Straße in West Berlin on 2 August 1959.  It was race 6 of 9 in the 1959 World Championship of Drivers and race 5 of 8 in the 1959 International Cup for Formula One Manufacturers.  It was the 21st German Grand Prix and was only the second time the race was not held at the Nürburgring.  AVUS had previously held the original German Grand Prix in 1926.  The race was held over two 30 lap heats of the eight kilometre circuit for a total race distance of 498 kilometres.

1974 German Grand Prix: The 1974 German Grand Prix was a Formula One motor race held at the Nürburgring on 4 August 1974.  It was race 11 of 15 in both the 1974 World Championship of Drivers and the 1974 International Cup for Formula One Manufacturers.  It was the 36th German Grand Prix and the 33rd to be held at the Nürburgring complex of circuits.  The race was won by Swiss driver Clay Regazzoni driving a Ferrari 312B3.  Regazzoni led every lap on the way to his second Grand Prix victory, some four years after his debut victory at the 1970 Italian Grand Prix.  South African driver Jody Scheckter was second driving a Tyrrell 007 ahead of Argentine driver Carlos Reutemann (Brabham BT44).

Hockenheimring: The    is a motor racing circuit situated in the Rhine valley near the town of Hockenheim in Baden-Württemberg, Germany, located on Bertha Benz Memorial Route.  Amongst other motor racing events, it biennially hosts the German Grand Prix, with the most recent being in 2016.  The circuit has very little change in elevation.  The circuit has FIA Grade 1 license.

2013 German Grand Prix: The 2013 German Grand Prix (formally known as the Formula 1 Großer Preis Santander von Deutschland 2013) was a Formula One motor race that was held on 7 July 2013 at the Nürburgring in Nürburg, Germany.  The race was the ninth round of the 2013 season, and marked the 74th running of the German Grand Prix overall, and the 60th running of the German Grand Prix since 1950, when the racing series now known as the Formula One World Championship was created.  This is the earliest a German Grand Prix has been held in a calendar year, followed by the 1926 and the 2009 editions of the race.

Supporting paragraphs: 2004 German Grand Prix Hockenheimring
Answer: Rhine valley