A typical modern Tour de France has 21 stages. The race usually unfolds across 23 days, with two rest days separating the three weeks of competition.
The 21 stages can include flat road stages for sprinters, hilly stages, mountain stages and time trials. The precise mix changes each year, but the overall structure is designed to test different kinds of riders while preserving the event’s three-week identity. The final stage traditionally finishes in Paris, although its route and racing character can vary.
The Tour began in 1903 and has not always used the modern format. Early editions had different numbers of stages, and exceptional circumstances have also affected the schedule. That is why “21” describes the standard contemporary structure rather than an absolute rule for every edition in history.
Another common mistake is counting rest days as stages. They are part of the race calendar but do not count toward the 21 competitive stages. Time trials count as stages too, even though riders start individually or in teams rather than in a mass road start.