Here where the Alsace Wine Route begins, is Marlenheim's celebrated Steinklotz. At an altitude of between 200 and 300 metres, this steep slope lies on a calcareous block of Muschel-kalk and dolomitic Keuper, covered by barely 20 cm of loam, with a mainly calcareous scree at its eastern edge.
Facing south-south-east, the Steinklotz benefits from a maximum amount of sunshine. With a subsoil of heat-retaining shingle and a dry and very warm environment, it is a perfect site for the cultivation of the finest grape varieties.

The Steinklotz's 40,60 ha are ideally suited to Tokay Pinot Gris, Riesling and Gewurztraminer.

The Steinklotz vineyard dates from the early Middle Ages. Gregory of Tours relates that in 589 AD the Merovingian King Childebert II owned vineyards in Marlenheim. This is the first written record of wine in Alsace. In 613 AD, Dagobert donated the Steinklotz vineyards to the convent of Haslach.

The Steinklotz wines have great nobility and long ageing potential. They develop the delicate fruitiness and spicy aroma which characterise wines of calcareous origin