Blois to Cudillero Road Trip Guide: Scenic Drive Through France & Spain

The drive from Blois (Loir-et-Cher) to Cudillero (Asturias) spans roughly 950 km through central France and northern Spain. A little-known fact: this route passes directly under the flight path of the famous Concorde test flights from the 1970s, which used the Loire Valley as a landmark.

Distinct from generic European road trips, this corridor combines château-dotted river valleys with the rugged Cantabrian coast. The journey offers a unique transition from continental wine regions to Atlantic seafood terrains.

The optimal approach is to take the A10 from Blois to Tours, then the A28 toward Le Mans, before joining the A11/A81 to Rennes. From Rennes, the N12 leads to Brest but you'll veer onto the E50/E60 to Nantes and eventually cross into Spain via the A63. After San Sebastián, the A8 winds toward Oviedo and finally the AS-17 to Cudillero.

Family and Child Suitability

Numerous roadside spots cater to children. The Parc de la Prairie in Tours has playgrounds. In Bordeaux, the Jardin Public offers a carousel. In Spain, the Monte de la Dehesa park in Oviedo has a mini train. Interactive museums: Cité des Sciences in Bordeaux (oceanography) and Museo de la Naturaleza de Cantabria in Carrejo.

• Blois: Léonard de Vinci museum (Clos Lucé) in Amboise (30 min detour).
• Rennes: Les Champs Libres science center.
• San Sebastián: Aquarium (with shark tunnel).

Pet-Friendly Framework

Most rest areas in France allow dogs on leashes. In Spain, dogs are permitted on beaches outside summer. Recommended pet-friendly cafes: Café des Arts in Tours, and La Casa del Perro in Santander (dog menu). Vet clinics: Clinique Vétérinaire du Breil in Nantes (24h emergency).

• Always carry a water bowl and waste bags.
• Some French toll stations have fenced pet areas.

Hidden Off-Route Spots

A detour of 5-10 minutes can reveal isolated gems. From the A28 at Château-du-Loir, the village of Vallée du Loir has a 12th-century Romanesque church. Near the A63 at Dax, the abandoned Château de Castelvieil (visible from the road) dates back to the 16th century. In Spain, from the A8 at Unquera, the deserted mining town of Carmona (5 min up a hill) offers a ghostly experience.

• Coordinates for Château de Castelvieil: 43.708, -1.058.
• Use Google Maps to navigate narrow lanes.

Fatigue Management and Rest Zones

Plan for a 20-minute break every three hours. Prime rest stops: Aire de la Vallée de l'Authie (A10, km 110) has a quiet garden. In Spain, Area de Servicio de Deba (A8, km 60) offers picnic tables with ocean views. For a nap, park at the secure parking of a 24h hypermarket (e.g., Carrefour in Irun).

• Chambers of rest (aire de repos) in France: clean toilets, vending machines.
• Spanish rest areas: no showers; use service stations.

Local Commerce and Culture

Roadside stalls sell authentic products: in the Loire, honey and goat cheese at Ferme de la Borde. Near Bordeaux, roadside barns offer cannelés and pineau. In Asturias, farmers sell casadielles (fried pastries) on the AS-17. Crafts: pottery from Galician villages near the A8.

• Cash only for most stalls; bring small bills.
• Open hours: typically 10:00-14:00; some reopen at 16:00.

For more tips on discovering hidden gems along the route, see how to find the best stops and hidden gems between cities.

Geographical Shifts

Blois sits in the Loire Valley, a UNESCO World Heritage region known for its Renaissance architecture and limestone plateau. As you drive south-west, the terrain flattens into the agricultural plains of the Pays de la Loire, then rises gently through the Gironde estuary. The most dramatic shift occurs after San Sebastián: the rolling green hills of the Basque Country give way to the limestone sierras of Asturias, with the Picos de Europa visible on a clear day.

• Blois to Tours: château-dotted, riverine landscape.
• Tours to Nantes: open fields of sunflowers and wheat.
• Bordeaux to Irun: pine forests and sand dunes (Arcachon Bay).
• San Sebastián to Cudillero: jagged coastline with sheer cliffs (Bufones de Pria).

UNESCO World Heritage Sites

Along this route, two UNESCO sites are within a short detour: the Loire Valley itself (from Blois to Sully-sur-Loire) and the Palace of Versailles (accessible via A10, 1h from Blois). Also, the historic city of Bordeaux (Port of the Moon) is a UNESCO site and lies directly on the route. In Spain, the Altamira Cave (near Santillana del Mar) is a 30-minute detour from the A8.

• Include a stop at Château de Chambord or Cheverny.
• In Bordeaux, visit the Place de la Bourse and the Cité du Vin.
• Altamira requires advance booking; alternative: see the replica in the Museo de Altamira.

Culinary Infrastructure

Regional diners and roadside eateries punctuate the route. In the Loire, stop at Le Prieuré in Restigné for rillettes and Vouvray wine. Near Nantes, La Cigale in Nantes is iconic but reserved; a simpler option is Le Petit Boucot. In the Basque Country, sidrerías (cider houses) like Zelaia in Hernani offer fixed menus. In Asturias, chicote (local seafood taverns) in Cudillero serve chopa and pixin.

• Blois area: Au Rendez-Vous des Pêcheurs (river fish).
• Bordeaux area: Bistrot Jean Mi in Lacanau (oysters).
• San Sebastián: La Viña (cheesecake) and Bar Sport (pintxos).
• Cudillero: La Taberna del Puerto (seafood stew).

Climatic Conditions and Aesthetics

Spring and autumn offer mild temperatures (15°C-20°C). Summer can be hot (30°C in Bordeaux), with afternoon thunderstorms near the Pyrenees. Winter brings fog in the Loire valley and snow in the Cantabrian mountains. For scenic sunsets, aim to be on the A8 near Llanes around 20:00 (summer) or 18:00 (winter). The view from Mirador del Picu Pienzu overlooks the sea.

• Strong winds on the A8 between Gijón and Cudillero; hold the steering wheel firmly.
• Fog reduces visibility on the N12 near Rennes; use fog lights.
• For sunrise, stop at Playa de Toró in Asturias.

Fuel and Route Economics

Fuel costs vary significantly. In France, expect €1.80/L for gasoline; in Spain, closer to €1.60/L. For a typical SUV averaging 8 L/100km, total fuel cost is around €185-€210.

• Fill up in France before crossing into Spain: fuel is cheaper on the Spanish side but stations are sparser in Cantabria.
• Use apps like GasBuddy (Europe version) or Waze to locate stations along the A63 and A8.
• Topography: the climb from Bordeaux to the Pyrenees reduces fuel efficiency by ~10% on older vehicles.

Tolls and Payments

The French portion (A10, A28, A63) is mostly tolled. Expect total tolls around €65-€80 for a standard car. The Spanish A8 is toll-free except near Bilbao. Carry a credit card with chip-and-PIN; not all booths accept cash.

• Bordeaux to Irun: €24 for the A63.
• San Sebastián to Oviedo: free except for the Pagoeta tunnel (€1.50).
• Have €50 in cash for Spanish tolls and village markets.

Road Quality and Night Illumination

The A10 and A63 French sections are well-lit and in excellent condition. The A8 in Cantabria has limited lighting between Llanes and Cudillero; plan to arrive before dusk. The final stretch on AS-17 is narrow and unlit—drive with caution.

• Surface condition: overall smooth, but watch for potholes on secondary roads near Cudillero.
• Safety tip: on the A8, strong crosswinds near the coast; reduce speed.
• Rest areas every 20 km on French highways, every 30 km on Spanish ones.