West of the main ridge of Pirin, in the circus Chaira, is a group of 9 lakes. Located between the peaks and Mozgovishki chukar and Prevalski chukar they can be easily found, as they are located on the ecotrail to the hut "Yane Sandanski”. A relatively small lakes with a total area of 92 decares and a water volume of 16,000 m3. They are located at different altitudes. The highest one is 2430 meters and has an area of 1.2 decares.The next highest lake is 2,427 meters and covers an area of 9.2 decares. The third lake is situated at 2,416 meters above sea level and its area is 22.6 decares. The difference in altitude of the third and fourth lake is just a meter as the fourth lake is very small - only 1.2 decares. Fifth lake is located at an altitude of 2,413 meters and an area of 1.6 decares. Sixth lake from this group of lakes is situated at an altitude of 2,412 meters and has a very small area of 1.2 decares. Seventh lake, which is also called Dalgovidno, is at 2,355 m with an area of 18.9 decares. The eighth lake is the largest of these lakes and hence its name Golyamo ezero (BigLake). Its area is 25,2 decares and is located at 2,235 meters altitude. The last, ninth lake, which is the lowest, at an altitude of 2,205 meters occupies an area of 11,8 decares. Chairski lakes are near the tourist trail leading from hut Demyanitsa to hut Yane Sandanski. The trail is marked in green.