Colmar-sur-Mer to Ulm Road Trip Guide: Stops, Scenery & Tips

Did you know that the A5 motorway near Freiburg im Breisgau was built directly over a Roman road connecting the Rhine to the Danube? This 510-kilometer (317-mile) drive from Colmar-sur-Mer to Ulm follows a historic corridor of trade and conquest, now a modern asphalt artery under the shadows of the Black Forest and Swabian Alps.

Allow roughly 5 to 5.5 hours of pure driving time, but budget at least 7 to 8 hours to savor the landscapes. The route primarily uses the A35 and A5 highways (E35/E54 corridor) before transitioning to the A8 near Stuttgart. The coordinates of Colmar-sur-Mer (48.0° N, 7.4° E) and Ulm (48.4° N, 10.0° E) mark a journey that cuts across three countries: France, Germany, and a short optional detour through Switzerland.

German Autobahn safety standards are high: emergency phones every 2 km, well-lit rest areas, and immediate breakdown assistance via ADAC. Watch for speed cameras on the A8 near Stuttgart (average speed check between Esslingen and Ulm). On the A5 near Offenburg, dense fog is common from October to February; use low beams and reduce speed.

For families, the best stop is Raststätte Baden-Baden, which has a large indoor play area and a children's menu at the attached restaurant. Another great option is the Wildpark Waldkirch (exit Waldkirch on A5), a free wildlife park with deer and wolves.

• Fatigue management: Use the '20-minute power nap' at Raststätte Ulm-Dornstadt (quiet zones with reclining chairs)
• Pet-friendly framework: Most German rest stops allow dogs on leash; there are designated dog walking areas at Raststätte Michelfeld (A8)
• Emergency numbers: 112 (EU wide), 0800 833 35 35 (ADAC roadside assistance)
• Family attractions: Legoland Deutschland (Günzburg, 1 hour from Ulm), Europa-Park (Rust, 30 min from Colmar-sur-Mer)

Your journey begins on the D83 in Colmar-sur-Mer, quickly merging onto the A35 north toward Strasbourg. The first 70 kilometers (43 miles) are flat, passing through the Alsatian vineyards. After crossing the Rhine at the German border (Europastraße), you join the A5 near Kehl. The A5 is a well-maintained German Autobahn with sections unlimited, but near Freiburg expect construction zones limiting speed to 120 km/h.

Fuel stations are abundant every 20–30 km on the A5, with prices averaging 1.80 EUR per liter for E10 and 1.90 for Diesel. In Germany, rest stops (Raststätte) offer clean toilets, playgrounds, and restaurants. The A8 between Stuttgart and Ulm has more frequent service areas (e.g., Raststätte Gruibingen, Kirchheim).

• Key fuel stops: Colmar-sur-Mer (Total), Freiburg (Shell or Aral), Stuttgart (Esso), Ulm (Aral)
• Rest areas with playgrounds: Raststätte Baden-Baden (A5), Raststätte Gruibingen (A8)
• Electric vehicle charging: Fast chargers (150+ kW) at Ionity stations near Freiburg and Stuttgart
• Toll info: No tolls in Germany; optional Swiss vignette (40 CHF) if detour through Basel

The A5 snakes through the Upper Rhine Plain, offering views of the Vosges Mountains to the west and Black Forest to the east. Between Offenburg and Freiburg, you can spot the Kaiserstuhl volcanic hills on your left, known for Pinot Noir vineyards. After Freiburg, the landscape rises gently: the A5 climbs through the Swabian Jura, with the A8 cutting through the Schwäbische Alb biosphere reserve. Near Ulm, the terrain flattens into the Danube valley.

For a detour into the Black Forest, exit at Baden-Baden and drive the Schwarzwaldhochstraße (B500) for 60 km of panoramic hairpins; allow 1.5 hours extra. The route also passes within 10 km of the Hohenzollern Castle, accessible via B27 south of Hechingen.

• Natural highlights: Black Forest views, Swabian Jura escarpment, Danube valley
• Local commerce: Alsatian wine markets (Riquewihr), Freiburg farmers' market (Münsterplatz), Metzingen outlet city (Hugo Boss, Adidas)
• Hidden gem: Blautopf spring near Blaubeuren (10 km west of Ulm) – a deep karst spring with mesmerizing blue water
• Foraging tip: In autumn, collect mushrooms in the Black Forest with a permit (available at tourist offices)