Turin to Thun Road Trip Guide: Alps, Valleys & Local Gems

The A5 motorway from Turin to Thun crosses the Italian and Swiss Alps via the Grand St Bernard Tunnel (T2), a 5.8 km engineering feat completed in 1964. The tunnel connects Aosta Valley to Valais at an altitude of 1,918 m, making it one of Europe's highest road tunnels. This route bypasses the need for mountain passes, but the approach and exit offer dramatic elevation changes.

Total driving distance is approximately 230 km (143 mi), with an estimated time of 3 hours without stops. However, prudent drivers allocate 5–6 hours to enjoy the scenery and detours. The road network includes the Italian A5 and Swiss A9 highways.

For discovering offbeat stops along any route, see how to find the best stops and hidden gems between cities.

Natural Landscapes & Attractions

The route passes through three distinct landscapes: the Po plain vineyards, the Aosta Valley's alpine meadows, and the Rhone valley's terraced slopes. Key natural highlights:

• Mont Blanc massif visible from Aosta valley.
• Grand St Bernard col with its lake (Lac du Grand St Bernard) above the tunnel.
• Trient Gorge near Martigny.
• Lake Thun at the destination.

UNESCO World Heritage Sites

Two UNESCO sites lie near the route:

• Vineyards of Piedmont (Langhe-Roero and Monferrato): Detour 60 km south of Turin.
• Swiss Alps Jungfrau-Aletsch: Accessible from Thun area.

No direct UNESCO sites on the main route.

Local Commerce & Culture

Antique markets in Aosta (every Wednesday) sell local crafts and Fontina cheese. In Martigny, the Fondation Pierre Gianadda museum exhibits art and vintage cars. Swiss villages offer wooden cuckoo clocks and chocolate shops.

• Buy local honey in St-Rhémy-en-Bosses (Italian side).
• Swiss army knives at Victorinox store in Martigny.

Infrastructure Safety & Road Quality

Both A5 and A9 are modern motorways with good signage and lighting in tunnels. The Grand St Bernard Tunnel has a 60 km/h speed limit and strict no-overtaking rule. Road quality is excellent, but winter (November–April) requires snow tires or chains in the tunnel zone.

• Emergency phones every 200 m in tunnel.
• Variable message signs indicate snow conditions.

Family and Child Suitability

Family-friendly stops include:

• Parco Nazionale del Gran Paradiso (entry near Aosta) with easy trails.
• Martigny's Barryland museum (St Bernard dogs).
• Thun castle and lake cruise.

Pack lunch for children; restaurant options are limited between Aosta and Martigny.

Pet-Friendly Framework

Most Italian rest stops accept dogs on leashes. Swiss rest areas require dogs to stay in car. The tunnel does not allow pets outside vehicles. Recommended stops with pet relief areas:

• Passeggiata in Aosta (green area near Roman walls).
• Rest area Saxon (Switzerland) with dog waste bags.

Fatigue Management & Rest Zones

Plan rest every 2 hours. Best rest zones:

• Area di Servizio Pia (just after Ivrea): panoramic view.
• Raststätte Saxon (Swiss side): large parking and coffee.

Avoid stopping on hard shoulders. Use official rest areas.

Hidden Off-Route Spots

• Roman Theatre in Aosta (free, 10 min detour).
• Fort de Bard museum (30 min detour, impressive fortress).
• Lac d'Émosson (cable car from Finhaut, Swiss side).
• Château de Chillon (near Montreux, 20 min from main route).

Culinary Infrastructure

Italian side: try polenta concia in Aosta (Fontina cheese) and Valle d'Aosta red wine (e.g., Donnas). Swiss side: raclette cheese shop at Martigny, and fondue in Thun. Recommended roadside eateries:

• Ristorante Les Neiges d'Antan (Italian tunnel entrance) for traditional dishes.
• Restaurant Le Relais de la Tour (Martigny) for local wines.

Climatic Conditions & Route Aesthetics

Summer (June–September): mild temperatures, clear roads, best for views. Autumn: larch foliage golden in Valais. Winter: snow possible even at tunnel level, requiring caution. Spring: melting snow, occasional fog in valleys. The tunnel is bright well-lit.

• Best photo spots: Gorges du Trient (Swiss side) at sunset.

Motorways and Toll Systems

The Italian A5 (Autostrada Torino-Aosta) is a toll road with a fee of approximately €0.08/km. Payment options include credit card, cash, or Telepass. The Swiss motorway system (A9) requires a vignette (CHF 40 for one year) for vehicles up to 3.5 tons. Purchase at border gas stations or post offices.

• Italian A5 exit at Aosta Ovest for free alternative SS26.
• Swiss A9 exit at St-Maurice for scenic Route 9 along the Rhone.

Fuel and Route Economics

Fuel prices decrease in Italy (€1.50/L) compared to Switzerland (€1.70/L). Fill up before crossing the border. Total fuel cost for 230 km round trip is about €35–45. Tunnel toll: €30.20 (one-way) plus Swiss vignette if not already purchased.

• Recommended Italian gas stations: Q8 at Ivrea exit (cheapest).
• Swiss gas stations: Coop Pronto at Martigny (accepts Euro).

Rest Zones and Facilities

Italian rest areas every 15 km on A5, with bars, toilets, and parking. Swiss rest areas less frequent but well-maintained. Notable stops: Villeneuve (Italy) and Saxon (Switzerland) with playgrounds.

• Free parking at Aosta city center (4 h limit).
• Paid parking at Grand St Bernard tunnel plaza (CHF 5).