Lake Račevsko jezero is a lake formed at the water source of the Račeva River. The lake has a triangular shape and is 120 metres in length and 100 metres in width. The deepest measured point is 5.5 metres and the average depth is 2.9 metres. At the maximum water level, the lake’s surface measures 0.85 hectares. Otherwise, it heavily fluctuates.
The lake, which frogs use to spawn, even dries out once a year. Although the lake is one of the smallest in Slovenia, it is very interesting owing to its position on the passage from the Alpine to the Dinaric world, along with the fact that it is the only lake in this part of Slovenia.