The NNR covers two separate sections of the south–west oriented slope in the Vinařské údolí valley located 1.5 km SW of the village of Vinařice and south of the town of Louny in the Ústecký kraj – Ústí nad Labem Region. The NNR was declared in 1989 on a territory of 8,61 ha at an average elevation of 440 metres above sea level.
The subject of the protection is the ecosystem of opuka rock ledges and scree with populations of the endangered species Alpine bearberry (Arctostaphylos uva-ursi) and shrubby milkwort (Polygala chamaebuxus).
The geological basement is formed of Palaeozoic – Permian sediments (claystones, siltstones) which are overlain by Mesozoic sediments of the Bohemian Cretaceous Basin (Cenomanian sandstones, Lower Turonian claystones and silty marlstones – opukas). In the terrain the opukas form a steep to vertical rocky scarp around 15 metres in height. The more gently sloping areas below the rock walls are covered with fallen rocks and scree which cover the Cenomanian and Permian basement layers. Poor stony Cambisols cover the scree slopes and Pararendzinas have developed on the opukas.
In addition to the specially protected species we have already mentioned, the undergrowth in the thermophilous oak stands on the gentler slopes includes the aster Aster amellus, the cornflower Cyanus triumfettii, white helleborine (Cephalanthera damasonium), Cornelian cherry (Cornus mas), martagon lily (Lilium martagon), bastard balm (Melittis melissophyllum) and lesser butterfly orchid (Platanthera bifolia).
No exceptional or unusual animal species live here.
The NNR territory is predominantly covered by oak forest, with many other species represented, including Norway spruce, Scots pine, European larch, beech, maple, elm, lime and hornbeam.
Forestry management is aimed towards converting the cultural forest stands into stands with a tree species composition which is appropriate for the locality.