Heipker See, Protected nature reserve in Leopoldshöhe, Germany

Heipker See is a 24.6-hectare nature reserve (LIP-019) in the Heipke area of Krentrup, Leopoldshöhe, in North Rhine-Westphalia's Lippe district. The lake itself formed from former dry excavations and is fed by the Heipker Bach; the Werre river bounds the reserve to the east, separating Leopoldshöhe from Bad Salzuflen-Holzhausen. The site is a biotope complex of floodplain forest relics, grassland and the old diggings.

The lake itself is not natural: it formed in former dry excavations within the Werre valley, which were flooded to leave a standing water body. The surrounding area, with its floodplain forest relics and grassland, was later placed under protection as the nature reserve LIP-019, covering about 24.6 hectares on the Leopoldshöhe side of the Werre.

The reserve lies in the Heipke hamlet, part of Krentrup in Leopoldshöhe, and is crossed by the Heipker Bach; the Werre forms its eastern edge, the boundary with Bad Salzuflen-Holzhausen. The lake itself is not natural: it formed in former dry gravel pits, now flooded, which is why open water sits beside alluvial forest relics and grassland.

The reserve lies in the Heipke hamlet of Krentrup, in the municipality of Leopoldshöhe, and is bounded to the east by the Werre, which forms the border with Bad Salzuflen-Holzhausen. The Heipker Bach flows through the area. The neighbouring Holzhauser Bruch reserve, about 39.6 hectares, lies on the far side of the Werre.

The reserve lies in the Werre valley, and the river itself forms the border between Leopoldshöhe and Bad Salzuflen-Holzhausen. On the Holzhausener side, the adjoining Holzhauser Bruch reserve covers about 39.6 hectares. Both areas belong to landscape plan No. 2, "Leopoldshöhe / Oerlinghausen-Nord".