The Ballon d'Alsace was the first official mountain climb in the Tour de France on 11 July 1905, the first rider to the top of the climb being René Pottier and the stage being won by Hippolyte Aucouturier.
The Ballon d'Alsace was the first official mountain climb in the Tour de France on 11 July 1905 (though not the first actual major climb--see Col de la République). The first rider to the top of the Ballon was René Pottier, with the stage being won by Hippolyte Aucouturier.