From LeTour.com, the official website for Le Tour de France

Find it here: https://www.letour.fr/en/overall-route

Here are the highlights, according to the organizers.

• 8 flat stages
• 5 hilly stages
• 6 mountain stages with 3 finishes at altitude (Tignes, Saint-Lary-Soulan col du Portet, Luz Ardiden)
• 2 individual time-trial stages
• 2 rest days
• Stage 8 Vierzon > Le Creusot, 248 kms, will be the longest of the Tour since 2000 (Belfort > Troyes, 254,5 kms)

Flat stages generally favor the sprinters.  Mountain stages climbers and general classification contenders.  Hilly stages offer opportunities for everyone.  Individual time trials are for time-trial specialists, but it’s also where those racing for the overall can win or lose the race.