The Vlahini Lakes (Bulgarian: Влахини езера) is a group of six lakes, five of which are permanent, in the Pirin mountain range in southwestern Bulgaria, 1.5 km to the southwest from Vihren.
[1][2] The lakes are named after the village of Vlahi, located at a lower altitude.
The sixth lake is at the highest elevation and is the smallest in area among the group.
The Balkan trout (Salmo farioides) can be found in the lakes.
The water pours out as Vlahina river, a tributary of the Struma.