Colmar to Sion Road Trip Guide: Best Stops & Scenic Drive

The drive from Colmar to Sion covers approximately 180 kilometers (112 miles) and typically takes 2.5 to 3 hours without stops, following the A35 and A9 highways through the Rhine Valley and into the Swiss Alps. A quirky local fact: just after crossing into Switzerland near Basel, you'll encounter a short section where the highway is built on stilts over the Rhine floodplain, offering a strange sensation of driving above the river.

This route is more than just a transit corridor; it's a journey from Alsatian vineyards through the Jura foothills and into the Rhone Valley. Understanding the nuances of this drive can transform a simple transfer into a memorable experience. For tips on uncovering hidden spots, check out this guide on how to find the best stops and hidden gems between cities.

The geography transitions from the flat Alsatian plain to the Jura hills, then the wide Rhone Valley flanked by the Alps. West of Colmar, the Vosges mountains fade; eastward, the Black Forest is visible on clear days. The most dramatic shift occurs near the Swiss border: vineyards vanish, replaced by pastures and limestone cliffs.

• UNESCO sites: No direct UNESCO sites on the route, but the old town of Bern (a UNESCO site) is a 1-hour detour south. Alsatian Route of Wines (not UNESCO) runs through Colmar.
• Climatic conditions: Colmar is in a rain shadow, receiving 550 mm/year, while Sion gets 600 mm – both dry by Alpine standards. Wind funnels in the Rhone Valley can reach 80 km/h in the afternoon; sunset views from the hill of Valère in Sion are spectacular.

Local commerce stops: In the village of Bartenheim (exit 36 on A35), a farmer's market sells Alsatian Munster cheese and Flammkuchen kits. In Switzerland, the Martigny market (Wednesdays and Saturdays) offers dried meats and local wines.

Fuel costs for this route depend heavily on where you fill up. In France (Alsace), petrol averages €1.80/L, while in Switzerland it's around CHF 1.90/L (€1.95). Tip: fill up in France before crossing the border, especially at the Super U in Saint-Louis (coordinates: 47.589, 7.561), where prices are often 5% lower than Swiss stations.

• Fuel station density: High on A35 (every 20-30 km); moderate on A9 (every 30-40 km).
• Topography impact: The climb from Basel to the Jura passes increases fuel consumption by 10-15%.
• Recommended fuel efficiency: Maintain 110 km/h on A35, 100 km/h in Swiss mountain sections.

Toll roads: The French A35 is toll-free. Swiss highways require a vignette (CHF 40 for 14 months; buy at border or gas stations). No additional tolls for this route. Tunnels near Sion are lit and well-maintained.

Road quality: A35 is smooth with good lighting near cities; Swiss A9 has concrete sections with wider lanes. No toll gates cause slowdowns. Safety tip: watch for wildlife (deer and boar) on the A35 near the Forest of Haguenau.

• Family and child suitability: The Cité du Train in Mulhouse (a 15-minute detour) is a massive train museum with interactive exhibits for kids. The Bettmeralp (summer only) is a car-free village accessible via cable car from Betten.
• Pet-friendly spots: The dog park near the A35 rest area at Hirtzbach (exit 21) has fenced runs. Café du Soleil in Porrentruy (Switzerland) welcomes dogs with water bowls.

Fatigue management: Recommended rest zones – the Aire de Ferrette (km 40) has shaded parking and picnic tables. In Switzerland, the Raststätte Mumpf (A3) has a café. For a quick nap, park at the Belvédère viewpoint near Gampel (along A9), where the scenery helps refresh the mind.