Single location in the municipality of Randersacker (Maindreieck area) in the German growing region of Franken. The name is not derived from the planet Mars, but from the word "rotten" due to the dominant rock debris. The southwest, south and south-southeast facing vineyards at 180 to 290 metres above sea level with 20 to 65% slope, cover 37 hectares of vineyard area. They extend relatively far into the transverse valley of the Jakobbach. The "Spielberg" vineyard on the central impact slope is considered particularly privileged. The soils consist of extremely stony shell limestone. The two varieties Silvaner and Riesling are cultivated here. Shares in the vineyard are for example the Arnold Wilhelm, Bürgerspital, Göbel Martin, Schmachtenberger Berthold, Schmitts Kinder, Staatlicher Hofkeller Würzburg, Störrlein and Trockene Schmitts.