Tolminka is a mountain stream that runs through the city of Tolmin. Source of the river is near Polog in Triglav National Park (TNP) at altitude 683 meters above sea level. Tolminka river is known for it's gorges and magnificent blue emerald color. Here at Sotočje the Tolminka river ends after flowing for just 11,4km and joins the Soča river (154m above sea level).