The Kummenberg is a striking 667 m inselberg rising solitary from the floor of the Alpine Rhine Valley in Vorarlberg, Austria. This modest-looking hill holds an outsized place in local history - it's home to the oldest traces of human settlement ever found in Vorarlberg, dating back to the Mesolithic period.

What makes the Kummenberg special is its isolated character - the entire mountain sits within the municipality of Koblach, whose old village centre nestles at its base, and it marks the traditional boundary between Vorarlberg's Oberland and Unterland regions. Thousands of years ago, Lake Constance stretched all the way to Rankweil, meaning the Kummenberg was once a true island or at least a coastal outcrop in a fish-rich freshwater lake. Today it's a peaceful destination offering wide views across the Rhine Valley, surrounded by the four communities of the amKumma region, and neighboured by the dramatically split Udelberg hill.

How to reach the summit

• Koblach (old village centre at the foot of the mountain) — route difficulty ranges from easy to moderate depending on the path chosen
• Alternative approaches possible from the neighbouring amKumma communities of Altach, Götzis or Mäder

Good to know

• A transmission facility for emergency services was built into the north rock face just below the summit, completed in 2025
• The former Kadel quarry lies on the western slope, linked to the historic Rhine regulation works
• The neighbouring Udelberg was blasted into two separate pieces in 1971 during construction of the A14 motorway - now one of the most recognisable landmarks along the route

Interestingly, there were once plans for a six-level complex at the Udelberg gap with parking, petrol stations, shops and restaurants - a project that was never actually built.