The Pirin Natural Park covers the mountain with the same name. Pirin Mountain is situated between the valleys of the rivers Struma and Mesta. It is separated from Rila Mountain by the Predela Col and from Slavyanka Mountain by the Parilska Col. The mountain covers an area of 2 585 hectares with highest peak Vihren (2 914m).
The Yulen Reserve was established in 1994 with a protected area of 3 156,20 hectares. The reserve was established to preserve the forest, sub-Alpine and Alpine ecosystems and the habitats of endemites, rare and endangered animal and plant species. The reserve includes several lake complexes: The Vasilashki Lakes, Tipitzkite Lakes, Strazhishki and Polezhanskite Lakes and several single lakes. The territory of the reserve is covered with centuries-old forests of white fir, white pine, spruce, fir, dwarf pine and single centuries-old trees of black fir. There are 700 species of higher plants in Yulen of which 44 are included in the Red Book of Bulgaria. Typical representatives of the fauna are: the bear, the wolf, the wild goat, the titmouse, the woodpeckers, the squirrels, the cocks of the wood, the quails. The lakes are full of Balkan trout. Yulen is located on the territory of the town of Bansko, Blagoevgrad District.
The Bayuvi dupki-Dzhindzhiritza Reserve was proclaimed for a reserve in 1934 and occupies an area of 2 873 hectares. Typical for the reserve are the rocky walls and massifs in the Alpine zone and the dry valleys. Within the limits of the reserve there is varied coniferous vegetation represented by 7 tree types. Bayuvi dupki - Dzhindzhiritza is a biosphere reserve.
The Vasilashki Lakes are about 12 glacial lakes in the Vasilashki circus in Northern Pirin. They are located at a height of 2 126 to 2 370 m. The lakes are surrounded by the peaks Vazela, Tipika, Small and Big Todorin Peak, Vasilashki Chukar. The biggest of them are the Tevnoto Lake of 6,39 hectares and depth of 29 m, the Ribnoto Lake of 3,59 hectares and a depth of 3,1 m, the Gornoto Lake of 2,89 hectares and a depth of 13,4 m. From the Vasilashki Lakes springs the Vasilashka River.
The Valyavishki Lakes are about 15 glacial lakes in the Valyavishki circus in Northern Pirin. They are amphitheatrically arranged at a height of 2 254 to 2 472 m. The Big (Long) Lake is at a height of 2 280 m, covering an area of 8,5 hectares and a depth of 18,9 m. There are two islands in the lake covered with dwarf pine. The lake is full of trout. From the Valyavishki Lakes springs the Demyanitza River.
The Kremenski Lakes are 5 circus lakes in the Kremenski circus in Northern Pirin. They are at a height of 2 180 to 2 356 m and are amphitheatrically arranged. The lakes occupy the area among the peaks Dzhano, Sivriya and Kremenski. The Lower Lake (9,8 hectares) and the Upper Lake (6,6 hectares) are among the most beautiful and biggest lakes of Pirin. From the Kremenski Lakes springs one of the tributaries of the Retizhe River.
The Bunderishki Lakes are 20 glacial lakes in the Bunderishki circus in Northern Pirin. The biggest among them are the Ribnoto Lake (6,5 hectares and a depth of 12,2 m) and the Long Lake (4,55 hectares and a depth of 10 m). The lakes are full of trout. From the Bunderishki Lakes springs the Bunderishka River.
The Vlahinski Lakes are 4 glacial lakes in Northern Pirin located to the southwest of the Pirin Peak. The lakes are amphitheatrically arranged at a height of 2 291 - 2 302 m. The biggest and the highest among them is the Big Vlahinsko Lake of 6,3 hectares and a depth of 13,4 m. From the Vlahinski Lakes springs the Vlahinska River.
The Polenski or Chairski Lakes are a group of 10 glacial lakes on the western slopes of Northern Pirin. They are arranged amphitheatrically in the Polenite circus at a height of 2 205 to 2 430 m. The biggest among them is the Osmoto Lake of 2,52 hectares and a depth of 4,4, m. The Polenitza River, which is a tributary of the Sandanska Bistritza River, springs from the lakes.
The Popovi Lakes are 25 glacial lakes in Northern Pirin in the Popovski circus. The lakes occupy the area among the peaks Samodivski peak (Dzhengal), Momin Dvor, Orlovetz (Dzhano) and Ostretz (Sivriya) at a height of 2 030 to 2 260m. The biggest is the Second Popovo Lake at a height of 2 234m and a size of 12,4 hectares and a depth of 29,5 m. The lake is a tourist site.
The Spanopolski Lakes are a small group of 8 lakes in Northern Pirin. They are shallow lakes located in the Big Spano Pole circus. The biggest lake in the group is the Long Lake with a size of 1,3 hectares.
Tevnoto Lake is a glacial lake in Northern Pirin. It is located in the Belemeto circus at a height of 2 512 m. The Tevnoto Lake is the biggest from the group of the Belemetski Lakes. It covers an area of 6 hectares and is 3,9 m deep. Near the lake there are Alpine pasture lands and forests of dwarf pine.
The Kazanite are dry circuses in the white marble rocks of Northern Pirin. They are located between the peaks of Vihren and Kutela. The Big Kazan is located at a height of 2 400 m and the small one at a height of 2 300 m. In the region around the Kazanite grows edelweiss. There are about 30 types of edelweiss in the world and in Bulgaria grows only one of them.