Prix du Jockey Club initially 2,500 metres, and this was cut to 2,400 metres in 1843. It was switched to Versailles during the Revolution of 1848, and it was cancelled due to the Franco-Prussian War in 1871. The race was abandoned in 1915, and for three years thereafter it was replaced by the Prix des Trois Ans. This took place at Moulins in 1916, Chantilly in 1917 and Maisons-Laffitte in 1918. The first two runnings after World War I were held at Longchamp. A substitute race called the Prix de Chantilly was run at Auteuil over 2,600 metres in 1940. The Prix du Jockey
Grand Prix du Comminges different route. The hilly terrain allowed for excellent viewing close to the beginning and end of the race from atop a hill at the outskirts of Saint-Gaudens. In 1926, the French Grand Prix was held here over a slightly altered course and in the 1930s, the course layout was modified a few times beginning with changes made to accommodate holding the official French Grand Prix in 1928. At the 1932 race, a stroke of luck saved several spectators from death. René Dreyfus was leading in his Bugatti going into the final lap. Rain fell and on the wet road he