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Famous route
D902

Route des Grandes Alpes

The classic crossing of the French Alps, from Lake Geneva to the Mediterranean over more than fifteen passes.

Length
about 700 km
Passes
15+
Suggested time
5–7 days
Open
Jun–Oct

Before you go

  • The highest passes usually open in June and close in October.
  • Fill up before each pass: fuel stations are rare up high.
  • Allow extra time; average speeds on mountain roads are low.

North to south

From Thonon, the route climbs through the Chablais to the Mont Blanc massif, then over the Iseran, Galibier and Izoard towards Briançon. The southern half runs through Mercantour country before the long descent to Menton.

FAQs

Is the route suitable for motorhomes?

Yes, most of it is, though some passes are narrow and steep. Check your brakes, descend in low gear and avoid the busiest summer weekends.