The Chairski Lakes are a group of nine glacial lake

Glacial lake

A glacial lake is a lake with origins in a melted glacier. Near the end of the last glacial period, roughly 10,000 years ago, glaciers began to retreat. A retreating glacier often left behind large deposits of ice in hollows between drumlins or hills. As the ice age ended, these melted to create...

s in the Pirin

Pirin

The Pirin Mountains are a mountain range in southwestern Bulgaria, with Vihren the highest peak, situated at . The range extends about 40 km northwest-southeast, and about 25 km wide. Most of the range is protected in the Pirin National Park...

 mountain, south-western Bulgaria

Bulgaria

Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...

. They are located in a large cirque

Cirque

Cirque may refer to:* Cirque, a geological formation* Makhtesh, an erosional landform found in the Negev desert of Israel and Sinai of Egypt*Cirque , an album by Biosphere* Cirque Corporation, a company that makes touchpads...

 called Chaira in the valley of the river Sandanska Bistritsa. They are situated between the peaks Mozgovishki and Prevalski Chukar at an altitude between 2,200 and 2,450 m. Their total area is around 92 decares which is with 30 decares less than the largest lake in Ririn, the Popovo Lake

Popovo Lake

The Popovo Lake is the largest of the eleven Popovo Lakes. The lake and its vicinity is among the most popular places for summer tourism in the Pirin National Park...

. Their total volume is 160,000 m³ which is eight time less than the Popovo lake.

The tourist route from the Demyanitsa refuge to the Yana Sandanski refuge goes near the Chairski lakes.