The Oberrieder Weiher is like many other ponds in the valleys of Günz and Mindel a former gravel pit which is filled with ground water. The pond is located near the river Günz in the municipality of Breitenthal in the district of Günzburg. Because of this origin as gravel pit the form of the Oberrieder Weiher is nearly a square. the specific feature of the Oberrieder Weiher is its area of 34,7 hectare.