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Route Napoléon or Route des Grandes Alpes?

Route Napoléon or Route des Grandes Alpes? Both routes compared: length, driving time, best season, tolls and road limits, with our recommendation.

Route NapoléonRoute des Grandes Alpes
RouteGrenoble → CannesThonon-les-Bains → Menton
Suggested days35
Distance289 km (180 mi)444 km (276 mi)
Driving3 h 60 min6 h 08 min
Stops77
Best time to goMay–June and September–OctoberJune–September
Tolls and vignettes≈ €20≈ €30
Good to know–Mountain passes: Col du Galibier (2,642 m, usually open June–October).

Our recommendation

Choose the Route Napoléon if you have three days for a gentler run from the Alps to the Riviera: about 289 km from Grenoble to Cannes on the toll-free N85, via Sisteron and Castellane, with the Gorges du Verdon as a detour. Best in May–June and September–October. Pick the Route des Grandes Alpes if you have five days for about 444 km from Lake Geneva to Menton, past Mont Blanc and over the 2,642 m Col du Galibier. It is a June–September trip, and its narrow, partly unguarded pass roads call for a slow pace in a large motorhome.

How we work: data and estimates