| Große Kulmke | |
|---|---|
| Location | northeast of Sieber in Osterode am Harz district in Lower Saxony, Germany |
| Length | 5 km |
| Source | near the Auf dem Acker ridge |
| Source height | 760 m |
| Confluence | with the Kleine Kulmke to form the Kulmke |
| Mouth height | 392 m |
| Descent | 368 m |
| Basin | Weser |
| Progression | Kulmke → Sieber → Oder → Rhume → Leine → Aller → Weser → North Sea |
| Catchment | 7.5 km² |
| Right tributaries | Hirschkappe and Bienenkappe |
| Left tributaries | Bornkappe |
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.