Pirin National Park (Bulgarian: Национален парк "Пирин"), originally named Vihren National Park, covers most of the Pirin Mountains in southwestern Bulgaria. It spans an area of 403.56 square kilometers (155.82 square miles).
It is one of three national parks in Bulgaria, along with Rila National Park and Central Balkan National Park. The park was created in 1962, and its area has grown over time. In 1983, Pirin National Park was named a UNESCO World Heritage Site. The elevation ranges from 950 meters (3,120 feet) to 2,914 meters (9,560 feet) at Vihren, which is Bulgaria’s second-highest mountain peak and the third-highest in the Balkans.
The park is located in Blagoevgrad Province, the westernmost part of Bulgaria. It covers parts of seven municipalities: Bansko, Gotse Delchev, Kresna, Razlog, Sandanski, Simitli, and Strumyani. There are no towns or villages inside the park. Two nature reserves are within the park: Bayuvi Dupki–Dzhindzhiritsa and Yulen. Bayuvi Dupki–Dzhindzhiritsa is one of Bulgaria’s oldest nature reserves, established in 1934. It is part of the UNESCO Man and Biosphere Programme. The entire park is included in the European Union’s Natura 2000 network, which protects natural areas.
Pirin National Park is famous for its 118 glacial lakes. The largest and deepest is Popovo Lake. Many of these lakes are found in cirques, which are bowl-shaped landforms created by glaciers. There are also a few small glaciers, such as Snezhnika and Banski Suhodol. These glaciers are located in deep valleys near Vihren and are the southernmost glaciers in Europe.
Pirin National Park is part of the Rodope montane mixed forests region, which is a type of land area in the Palearctic temperate broadleaf and mixed forest region. Forests cover 57.3% of the park’s area, and about 95% of these forests are made up of conifer trees. The average age of the forests is 85 years. The oldest tree in Bulgaria, Baikushev’s pine, is found in the park. It is about 1,300 years old and lived at the same time as the founding of the Bulgarian state in 681 CE. The park is home to a wide variety of wildlife, including 45 species of mammals, 159 species of birds, 11 species of reptiles, 8 species of amphibians, and 6 species of fish.
History and park administration
Pirin National Park was created on November 18, 1962, to protect natural ecosystems, landscapes, and the plant and animal communities that live there. It was first called Vihren National Park and covered an area of 67.36 square kilometers. Over time, its size grew until it reached 403.56 square kilometers in 1999. In 1983, the park was added to the UNESCO World Heritage Sites list because it has very important natural features. According to Bulgaria’s Constitution, the park is owned only by the government.
The International Union for Conservation of Nature classifies Pirin National Park as a category II (national park), which means its main goal is to protect natural ecosystems while allowing people to visit and have supporting facilities. The entire park is part of the European Union’s Natura 2000 network for nature protection. BirdLife International has recognized the park as an important area for birds and biodiversity.
The park is managed by a department under the Ministry of Environment and Water of Bulgaria, located in the town of Bansko near the northern foothills of the mountain. As of 2004, the park had 92 employees. There are two visitor centers and information hubs in Bansko and Sandanski. The park is divided into six sectors: Bayuvi Dupki (with an office in Razlog), Vihren (with an office in Bansko), Bezbog (with an office in Dobrinishte), Trite Reki and Kamenitsa (both with offices in Sandanski), and Sinanitsa (with an office in Kresna).
Geography
Pirin National Park covers most of the Pirin mountain range in southwestern Bulgaria, which is part of the Rila–Rhodope Massif. To the north, the park is separated from the Rila mountain range by the Predel Saddle and mountain pass at 1,140 meters elevation. To the east, it reaches the valley of the Mesta River, including the Razlog Valley. To the south, the Paril Saddle (1,170 meters) forms the border with the Slavyanka mountain range. To the west, it reaches the valley of the Struma River. The park is entirely within Blagoevgrad Province, covering parts of seven municipalities: Bansko (36.6% of the park's area), Gotse Delchev (4.9%), Kresna (14.9%), Razlog (10.2%), Sandanski (30.7%), Simitli (2.3%), and Strumyani (0.4%).
The tectonics of Pirin were mainly shaped by Precambrian, Hercynian, alpine, and other tectonic movements. The modern landscape of Pirin was formed during the Pleistocene era (2,588,000 to 11,700 years ago), when glaciers covered the mountain due to global cooling. These glaciers formed at the same time as those in the Alps. The glaciers reached up to 2,200–2,300 meters in elevation. All glacial features in the mountain range are located within Pirin National Park.
The Pirin mountain range is divided into three sections: northern, middle, and southern. The northern section is the highest and includes all glacial formations and lakes. The park covers the northern section, which is split into two zones. The northern zone includes the steep marble Vihren ridge, home to the three highest peaks in the mountain: Vihren (2,914 meters), Kutelo (2,908 meters), and Banski Suhodol (2,884 meters), as well as the Koncheto ridge (2,810 meters). The southern zone includes granite ridges and features Pirin’s fourth highest peak, Polezhan (2,851 meters). There are more than 60 peaks above 2,600 meters in elevation.
The landscape of Pirin National Park is alpine and highly broken, with steep slopes, high ridges, and deep river valleys. The highest point is Vihren at 2,914 meters, the second-highest peak in Bulgaria and the third-highest in the Balkan Peninsula. The lowest point in the park is near Bansko at 950 meters. Nearly 60% of the park’s area is above 2,000 meters. The park’s elevation distribution is as follows: up to 1,000 meters (0.4% of the area), 1,000–1,600 meters (12.7%), 1,600–2,000 meters (30.0%), 2,000–2,500 meters (49.1%), and above 2,500 meters (7.8%). Over 90% of the park’s area is classified as steep or very steep.
Geologically, Pirin is a large anticline made of metamorphic rocks, including gneiss, biotite, crystalline schists, amphibolite, quartzite, and marble. Paleozoic granitoid rocks are found in limited areas near the park’s edges. Granitoid rocks from the Upper Cretaceous form two distinct areas: Northern Pirin and Bezbog. The Central Pirin area covers the southern part of the park and dates to the Upper Oligocene. Granitoid rocks cover 55% of the park’s territory.
Pirin is located in the continental Mediterranean climate zone. Due to its elevation, the higher areas have an alpine climate. The climate is influenced by Mediterranean cyclones in late autumn and winter, which bring frequent and heavy rain, and by the Azores anticyclone in summer, which makes summers hot and dry. The mountain’s shape greatly affects the climate. Pirin has three elevation-based climate zones: low (600–1,000 meters, 16% of the area), middle (1,000–1,800 meters, 40%), and high (above 1,800 meters, 44%). Temperatures decrease with elevation, especially in summer. The average annual temperature is about 9–10°C in the lower zone, 5–7°C in the middle zone, and 2–3°C in the higher zone. The coldest month is January, with average temperatures between −5°C and −2°C. The hottest month is July, with average temperatures of 20°C at 1,600 meters and 15°C at 2,000 meters. Temperature inversions, where temperatures increase with height, occur on 75% of winter days.
Annual rainfall ranges from 600–700 mm in lower areas to 1,000–1,200 mm in higher areas. Most rain falls in winter and spring, while summer is the driest season. Air humidity is 60–75% in August and 80–85% in December. In winter, precipitation is mostly snow, with 70–90% at lower elevations and 100% at higher elevations. The average number of days with snow cover ranges from 20–30 at lower elevations to 120–160 at higher elevations. The thickest snow cover reaches 40–60 cm at 1,000–1,800 meters in February and 160–180 cm above 1,800 meters in March (190 cm on Vihren). In some winters, snow thickness can reach 250–350 cm. Avalanches are common in winter.
The park’s area is nearly equally divided between the Struma River basin (51.1%) and the Mesta River basin (48.9%). The boundary between the basins follows the main
Biology
Pirin National Park is part of a special land area called the Rodope montane mixed forests, which is part of the Palearctic temperate broadleaf and mixed forest region. The plant communities in the park can be grouped into several types: those near lakes and rivers; bush areas in the subalpine zone; grasslands such as meadows, subalpine, and alpine pastures; forests; rock areas; and areas changed by human activity.
Forests cover about 57.3% of the park, or 231.10 km². Most of these forests are coniferous, making up 95% of the forested area, while 5% are deciduous. The average age of the forest is 85 years, and about 34.3% of the forested land has trees older than 140 years. The oldest tree in Bulgaria, a 1300-year-old Bosnian pine (Pinus heldreichii), is in the park. This tree lived at the same time as the founding of the Bulgarian state in 681 AD.
There are 16 tree species in the park. Three of these are found only in the Balkans: the Bulgarian fir (Abies borisii-regis), Macedonian pine (Pinus peuce), and Bosnian pine (Pinus heldreichii). The largest areas are covered by dwarf mountain pine (Pinus mugo) – 59.62 km², Macedonian pine – 54.15 km², Norway spruce (Picea abies) – 23.79 km², European beech (Fagus sylvatica) – 10.98 km², and Bosnian pine – 8.93 km². The Macedonian and Bosnian pines in the park make up 42% and 52% of their total areas in Bulgaria, respectively.
The park has a wide variety of plant life, with many species found only in this area. The mix of southern latitude and high elevation creates different environments for plants. The types of rock in the park, such as siliceous and calcareous, further shape these conditions. Lakes and streams add wetland habitats for plants that need water.
Plants without vascular systems, like algae, mosses, and lichens, are less studied in the park. Algae have 165 species, including two found only in the park. The most algae species are found in Popovo and Kremenski lakes. Mosses have 329 known species, and lichens have 367 species, which is 52% of Bulgaria’s total lichen diversity. Of these, 209 are in coniferous forests, and 156 are on calcareous rock.
The park has 1315 species of vascular plants, which are plants with veins in their leaves. These plants belong to 94 families and 484 genera, making up about one-third of Bulgaria’s total plant life. Many of these plants are native to the area, and more species may be discovered in the future, especially at lower elevations. The plants are almost equally divided between those from the sub-Mediterranean and Circumboreal regions. There are 114 species listed in Bulgaria’s Red Book of endangered plants. Of these, 18 are found only in the park, and 17 are found only in Bulgaria, totaling 35 unique species in the country. The park is also home to 86 species found only in the Balkans.
Some of the plants found only in the park include the Pirin poppy (Papaver degenii), Pirin meadow-grass (Poa pirinica), Urumov oksitropis (Oxytropis urumovii), Kozhuharov oksitropis (Oxytropis kozhuharovii), Banderishka lady’s mantle (Alchemilla bandericensis), Pirin lady’s mantle (Alchemilla pirinica), Kelererova asineuma (Asyneuma kellerianum), Pirin sandwort (Arenaria pirinica), Pirin sedge (Carex pirinensis), Pirin fleabane (Erigeron vichrensis), David mullein (Verbascum davidoffii), lesser Pirin fescue (Festuca pirinica), Pirin hogweed (Heracleum angustisectum), Yavorkova rattle (Rhinanthus javorkae), Pirin thyme (Thymus perinicus), Daphne domini, and Daphne velenovskyi.
The park has 229 species of vertebrates, which are animals with backbones. There are 45 mammal species, divided into groups such as Insectivora (5 species), Chiroptera (16 species), Lagomorpha (3 species), Rodentia (7 species), Carnivora (9 species), and Artiodactyla (4 species). The European snow vole is a relict species, meaning it is one of the few remaining from an ancient group. Some of the most important species for conservation are the brown bear, gray wolf, wildcat, European pine marten, wild boar, red deer, roe deer, and Balkan chamois. Small mammals like rodents and bats are not fully studied in the park.
There are 159 bird species in the park. About 57% of them, or 91 species, are songbirds. The park is also home to 16 fish species, 10 amphibian species, and 11 reptile species.
The park has
Recreation
Pirin National Park is a well-known place for visitors. The main information center is located in Bansko and has an interactive exhibit about the park's forests, helping visitors learn about the park's plants and animals. There is also a room with 30 seats that uses multimedia equipment for presentations. As of 2002, there were 1,837 beds available in the park, including 885 in mountain refuges, 214 in hotels, 124 in bungalows, and 615 in buildings owned by government departments. Some refuges include Bezbog, the largest and most modern one; Banderitsa, built in 1915 by order of Tsar Ferdinand I of Bulgaria; and Vihren.
There are 20 marked hiking trails in the park. Trail No. 1 is part of the E4 European long-distance path and goes through the park from Predel Refuge to Yavorov Refuge, then to Vihren Refuge, Tevno Lake, Pirin Refuge, and Popov Grasslands. The most difficult hiking trail runs along the top of the Koncheto ridge at an elevation of about 2,810 meters, between the peaks Banski Suhodol (2,884 meters) and Kutelo (2,908 meters). The north-western side of Koncheto is nearly vertical and 300–400 meters deep, while the south-western side is less steep (about 30 degrees) but reaches 800 meters in depth.
Development and Environmental Risks
Many things are harming the ecosystems in the park. Rock quarries, wildfires caused by people, logging, hunting animals illegally, too many people on trails, vehicles entering the area, and especially the ski resorts are causing serious damage to the park.
Since the early 1990s, ski facilities have been built along the northeast side of the mountain range, especially in the town of Bansko, which is now a popular winter resort. In 2003, a large forest area on Todorka Peak and nearby ridges was cleared to build the resort. Today, the resort has 13 ski lifts and 75 kilometers of slopes. The resort expanded even though the park rules strictly prohibit such activity within the park’s boundaries. Since construction began, the Glazne River has experienced severe flooding because of the changes made to the land.
In December 2017, the Bulgarian government suddenly changed the park’s rules to allow commercial logging and road and building construction within half of the park. This change caused protests against the continued changes to the world heritage site, which continued into February and March 2018. Ska Keller, vice-president of the Greens/EFA group in the European Parliament, supported the protests. In November 2017, the World Wide Fund for Nature and other local groups filed a lawsuit against the Bulgarian Ministry of the Environment and Water, believing that the development plans broke environmental rules.