Cassis to Davos Road Trip Guide: Scenic Alpine Drive

The drive from Cassis to Davos spans approximately 850 km (528 miles) and crosses three countries: France, Switzerland, and a short transit through Italy. A notable detail: the route passes within 20 km of Mont Blanc, Western Europe's highest peak, and includes the famous Col de la Bonette, one of the highest paved roads in Europe at 2,802 meters. This road trip offers a dramatic transition from the Mediterranean coast to the high Alps, with over 10,000 meters of cumulative elevation gain. The average driving time is 9–11 hours without stops, but you'll want to allocate at least 3 days to fully experience the highlights.

The route transitions from the limestone cliffs and turquoise calanques of Cassis to the lush valleys of Provence, then to the rugged peaks of the French Alps. After crossing into Italy, you'll traverse the Aosta Valley, dominated by the Matterhorn and Mont Blanc. Then, the Swiss Engadin region offers pristine alpine lakes like Lake Silvaplana. Notable UNESCO sites: the Historic Center of Avignon (30-min detour) and the Vineyards of Lavaux (near Montreux, 20-min detour). Also, the Prehistoric Pile Dwellings around the Alps (many in Switzerland) are UNESCO-listed.

• Calanques National Park (Cassis): limestone fjords, hiking trails
• Verdon Gorge (detour via D952): turquoise river, dramatic cliffs
• Col de la Bonette: lunar landscape, highest paved road in Europe
• Lac du Mont-Cenis: artificial lake on the French-Italian border
• Engadin Valley: Swiss National Park, Alpine marmots

Local commerce includes Provencal lavender products (soap, honey) in the south, Alpine cheese (Beaufort, Raclette) in Savoie, and Italian specialties (Fontina, cured meats) in Aosta Valley. In Davos, look for Engadin nuts cake (Nusstorte) and Bündnerfleisch. Roadside stalls near Albertville sell artisanal goat cheese, while in Bormio (Italy), you can buy pizzoccheri pasta.

The primary highways are the A50 from Cassis to Aubagne, then the A51 toward Grenoble. From Grenoble, take the A41 to Albertville, then the N90 through the Tarentaise Valley. After Bourg-Saint-Maurice, continue on the D902 to the Italian border at Col du Petit Saint-Bernard. Descend into Italy on the SS26, then re-enter Switzerland via the E27 to Martigny. Finally, take the A9 and then the A13 toward Davos. Estimated fuel costs for a standard car: around €120–€150 (gasoline) or €90–€110 (diesel), depending on current prices. Fuel stations are plentiful on French highways but become sparse in the Alps; fill up at Bourg-Saint-Maurice and again at Aosta or Martigny.

• Highways: A50, A51, A41, N90, D902, SS26, E27, A9, A13
• Tolls: Approximately €60–€80 (France and Switzerland require vignette)
• Swiss Vignette: Mandatory (€40 for 1 year); purchase at border or gas stations
• Fuel stations: Every 30–50 km in France, 50–80 km in Alps

For efficiency, maintain steady speeds (avoid heavy acceleration on climbs) and use engine braking on descents. The topography leads to higher fuel consumption; expect 8–10 L/100 km for gasoline cars. For more tips on how to find the best stops and hidden gems between cities, check our guide.

Road conditions vary: French highways are excellent, but alpine passes can be narrow with hairpin turns. Check pass status before departure (usually open June–Oct). Night illumination is sparse on mountain roads; drive only during daylight in the Alps. Safety tips: keep headlights on at all times in tunnels (many in Alps), carry chains in spring/autumn, and beware of wildlife (deer, ibex) at dusk.

• Emergency numbers: 112 (EU), 117 (Swiss police)
• Tunnel safety: obey speed limits, no overtaking in single-lane tunnels
• Mountain driving: use low gear on steep descents, avoid brake overheating

Family and child suitability: Parc de la Vanoise (near Val Thorens) has educational trails; the Swiss Transport Museum in Lucerne (detour) is excellent. Interactive stops: Glacier 3000 (near Les Diablerets) has a gondola and Alpine coaster. For pets, many alpine restaurants offer water bowls; recommended stops: Lac d'Annecy (dog-friendly beach), Verbier (pet-friendly cafes). Fatigue management: Rest zones at Aire de Manosque (A51, provence), parking at Lac du Mont-Cenis (panoramic rest), and the motorway services near Martigny. For a nap, find designated rest areas with picnic tables; avoid pull-offs on mountain curves.

Hidden off-route spots: the abandoned village of Le Désert (near Guillestre), reachable by a 5-min dirt road; the Chapelle de la Glacière (ice cave chapel) near Saint-Véran; the prehistoric rock art at Monte Bego (Tenda valley, requires short hike). Local culture: in Barcelonnette, Mexico-inspired architecture due to émigrés; in Orsières, Switzerland, authentic bourgnon (pinot noir) from the Valais.