The Pišnica River forms at the confluence of the Velika Pišnica and Mala Pišnica streams in the Julian Alps in the Kranjska Gora region of northwest Slovenia. The Pišnica joins the Sava Dolinka and runs through the central area of the Triglav National Park. At the confluence lies a small, natural canyon and an hydroelectric power plant. Because the source is glacial, the river's temperature remains cold (5-10°C) in the summer.