The Große Kulmke is one of the two headstreams of the Kulmke in central Germany. It rises near the natural monument of Mönchskappenklippe near the ridge of Auf dem Acker, north-northeast of Sieber in the district of Landkreis Osterode am Harz in Lower Saxony. It then flows mainly in a southerly direction, separated from the Sieber by the Königsberg. After 5 km it merges with the Kleine Kulmke at a height of 392 m to form the Kulmke. The valley of the Großen Kulmke part of the Sieber Valley (Siebertal) nature reserve.
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Osterode am Harz