The 1903 Tour de France was the first cycling race set up and sponsored by the newspaper L'Auto, ancestor of the current daily, L'quipe. It ran from 1 to 19 July in six stages over 2,428 km (1,509 mi), and was won by Maurice Garin.The race was invented to boost the circulation of L'Auto, after its circulation started to plummet from competition with the long-standing Le Vlo. Originally scheduled to start in June, the race was postponed one month, and the prize money was increased, after a disappointing level of applications from competitors. The 1903 Tour de France was the first stage road race, and compared to modern Grand Tours, it had relatively few stages, but each was much longer than those raced today. The cyclists did not have to compete in all six stages, although this was necessary to qualify for the general classification.

The pre-race favourite, Maurice Garin, won the first stage, and retained the lead throughout. He also won the last two stages, and had a margin of almost three hours over the next cyclist. The circulation of L'Auto increased more than sixfold during and after the race, so the race was considered successful enough to be rerun in 1904, by which time Le Vlo had been forced out of business.

Maurice-François Garin (pronounced [mɔʁis fʁɑ̃swa ɡaʁɛ̃, moʁ-]; 3 March 1871 – 19 February 1957) was an Italian then French road bicycle racer best known for winning the inaugural Tour de France in 1903, and for being stripped of his title in the second Tour in 1904 along with eight others, for cheating. He was of Italian origin but adopted French nationality on 21 December 1901.