Plymouth to Sion: A Scenic Road Trip Through France

Starting in Plymouth, England's historic port city on the southwest coast, you'll cross the English Channel via ferry to Saint-Malo or Cherbourg, then drive through the French countryside to Sion, the capital of the Swiss canton of Valais, nestled in the Rhône valley. The total drive from the French port to Sion covers approximately 900 km (560 miles) and takes around 9-10 hours of pure driving, but with stops, expect a full day or two.

One specific fact: The route passes through the Mont Blanc Tunnel, one of the world's longest road tunnels at 11.6 km, connecting France and Italy near Chamonix, but you'll stick to the French side via the A40 autoroute, which offers stunning views of the Alps without entering Italy. The key highways are the A84 from Caen, then A10/A6/E15 through Paris, and finally A40/E25 towards Sion.

The most efficient ferry route is from Plymouth to Roscoff (Brittany Ferries, 6 hours) or overnight to Saint-Malo. From Roscoff, you join the N12 to Rennes and then A11/A10 to Paris. Alternatively, the shorter crossing to Cherbourg (Plymouth to Cherbourg, 5 hours) leads directly to the A84. Both require tolls on French autoroutes; budget around €50-70 in tolls for the entire trip.

• Key roads: A84 (Caen-Rennes), A10 (Paris), A6 (Paris-Lyon), A40 (Lyon-Switzerland).
• Fuel stops every 30-50 km on autoroutes; prices higher on highways versus local stations. Consider filling up before entering Switzerland, where fuel costs more.
• Driving time: 9-10 hours from French port to Sion, but add 2-3 hours for rest and meals.

For an in-depth guide on planning stops, read how to find the best stops and hidden gems between cities.

French autoroutes are well-maintained and have rest areas (aires) every 15-20 km with toilets, picnic tables, and often playgrounds. Many have restaurants or vending machines. Speed limits: 130 km/h on toll roads (110 km/h in wet conditions), 110 km/h on dual carriageways, and 50 km/h in towns. Switzerland requires a vignette (€40) for highway use, which you can buy at the border or at any Swiss post office.

• Fatigue management: Take a 15-minute break every 2 hours. Good stop pairs include: after 2 hours (Caen area, using the Aire de Bretteville-sur-Odon), after 4 hours (near Chartres, Aire de Berchères), after 6 hours (near Lyon, Aire de la Chapelle-de-Guinchay), and after 8 hours (near Geneva, Aire de Nangy).
• Family stops: Le Grand Large playground near Chartres, the Futuroscope theme park near Poitiers (a bit off route), or the Aquarium du Grand Lyon in La Mulatière.
• Pet-friendly framework: Most rest areas allow dogs on leash. Many French hotels and some Swiss ones accept pets; check ahead. There are also dedicated dog parks at some aires, like Aire de la Baie du Mont Saint-Michel.

Hidden off-route spots: The medieval village of Pérouges near Lyon, with its cobbled streets and bouchon restaurants. Or the Gorges de l'Ardèche, a 2-hour detour but magnificent if you have time. For a quick scenic stop, the viewpoint on the D884 over the Rhône valley near Yenne is spectacular.

Leaving the Breton coast, you cross the Normandy bocage, then the Île-de-France region, before descending into the Burgundy vineyards. The A6 south of Paris passes through the Morvan Regional Natural Park, with rolling hills and forests. Further south, the Rhône valley opens up with views of the Alps on the horizon.

• Natural highlights: The Jura Mountains near the Swiss border, with the Biel Valley and the Rhône river gorge.
• UNESCO sites: Mont-Saint-Michel (near the ferry ports), the Palace of Versailles (just west of Paris), and the Historic Centre of Lyon. In Switzerland, the Lavaux Vineyard Terraces (a UNESCO site) are just west of Sion.
• Local commerce: Stop at a French market town like Mâcon or Bourg-en-Bresse for regional cheeses (Comté, Brie) and wines (Burgundy, Beaujolais).

While driving, you'll notice the change from the damp, green Atlantic climate to the drier continental climate of the Rhône valley. The best aesthetic is in autumn when the vineyards turn gold, or in spring when the Alps are still snow-capped.