The nature reserve with the identifier number 128 is located in a moraine landscape south of Kirchbarkau, between Bordesholm and Preetz. It protects an extensive lowland area formed during the Weichselian glaciation, including the two lakes Lütjensee and Hochfelder See. The lakes, which are crossed by waterways and share a common outflow to the Bothkamper See, are surrounded by extensive silting zones. The lowland area is predominantly near-natural. It is largely occupied by fen and wet forests, reed beds, and sedge marshes. In addition, there are tall herbaceous plants and wet grassland. The somewhat higher and drier elevations are dominated by grassland. Hedgerows and scattered deciduous forest communities and woodlands are also found.
The grassland areas are used for agriculture. Some areas are extensively grazed by Galloway cattle. The grassland areas are no longer drained and are thus becoming waterlogged.