Rila

Overview Rila is a mountain range in south-western Bulgaria, part of the Rila–Rhodope Massif. It is situated between five valleys – Dupnitsa Valley to the north-west, Samokov Valley to the north, Kostenets–Dolna Banya Valley to the north-east, Razlog Valley to the south and Blagoevgrad Valley to the south-west. Five saddles link Rila to the surrounding mountain ranges – Klisura Saddle (1,025 m) with Verila to the north-west, Borovets Saddle (1,305 m) with Sredna Gora to the north, Yundola (1,375 m) and Avramovo Saddles (1,295 m) with the Rhodope Mountains to the south-east and Predel Saddle (1,140 m) with Pirin to the south. Within these limits Rila spans an area of 2,629 km2 and has an average elevation of 1,487 m. The high elevation zone over 1,600 m forms about 50% of the total territory. There are over 140 main peaks above 2,000 m. With an elevation of 2,925 m at Musala, Rila is the highest mountain range in Bulgaria and the Balkan Peninsula, and the sixth highest in Europe after the Caucasus, the Alps, Sierra Nevada, the Pyrenees and Mount Etna. Musala is the fourth most isolated peak in continental Europe after Mont Blanc, Mount Elbrus and Galdhøpiggen raising at a distance of 810 km from the nearest point of the same elevation. With a prominence of 2,473 m, Musala ranks seventh among Europe's ultra-prominent peaks. Division The mountain range is divided into four distinct parts. East Rila, known also as Musala Rila, is the largest and highest subdivision, situated between the valleys of the rivers Beli Iskar and Belishka. It is formed of two main ridges. The Musala Ridge spans in north–south direction between the valleys of Beli Iskar and Maritsa; the Ibar Ridge runs in west–east direction from the summit of Marishki Chal to the Avramovo Saddle. Central Rila, known also as Skakavitsa Rila, is the smallest subdivision, covering 9% of the total area of Rila but has the most Alpine character and the highest average elevation — 2,077 m. other important peaks are Skalata, Small and Big Skakavets, Rilets; there are 28 peaks over 2,100 m. This subdivision is renowned mainly for the glacial lakes Ribni, Dzhendemski, Manastirski, as well as the largest glacial lake in the Balkan Peninsula — Smradlivo Lake. Northwest Rila, known also as Malyovitsa Rila, occupies about 24% of Rila and is situated between the valleys of Rilska to the south, Levi Iskar to the east, Samokov to the north-east and Dupnitsa to the west. Its much lower northern section is called Lakatitska Rila. It is linked with the Verila mountain range to the north through the Klisura Saddle, and with Central Rila to the east through the Kobilino Branishte saddle. The average elevation is 1,556 m; the highest summit is Mount Golyiam Kupen at an elevation of 2731 m. There are 29 peaks over 2,100 m. This subdivision is known for its rugged peaks and picturesque lakes in the Alpine zone that include the Seven Rila Lakes and the Urdini Lakes. Central Rila includes the mountain's highest waterfall, Skakavitsa (70 m). Southwest Rila stretches between the valleys of the Rilska, Iliyna and Belishka rivers to the north, the Predel Saddle that separates it from Pirin to the south, and Simitli and Blagoevgrad valleys to the west. It covers about 30% of the area of the mountain range. With an average elevation of 1,307 m, it has the lowest elevation in Rila. The highest summit is Angelov Peak (2,643 m). The Blagoevgradska Bistritsa River divides it in two distinct ridges to the north and to the south. Apart from its northernmost part, Southwest Rila does not have the Alpine character of the other three subdivisions. The biosphere reserve Parangalitsa is situated there. == Geology, relief and summits ==

Rila is a fault-block mountain and represents a crescent-shaped horst with two fault systems — concentric and radial. It is part of the oldest land in the Balkans, the Macedonian–Thracian Massif. The glaciers reached elevations as low as 1,200 m. Above this boundary, the glaciers radically altered the existing relief, forming deep cirques, pyramidal peaks, steep cliffs, long U-shaped valleys, moraine fields and other glacial forms. On the slopes of some valleys such as those of the rivers Beli Iskar, Maritsa and Rilska there are hanging glacier valleys — tributary valleys located higher than the main ones. The bottom of cirques are often occupied by glacial lakes. As a result of the weathering, scree formations of varied nature have been accumulated. In the south-western foothills of Rila the Stob Earth Pyramids were formed under the influence of erosion. The staged elevation of the mountain during the geological eras and the large range of vertical folds have led to the formation of four denudation levels of distinct age, height and range. The oldest Early Miocene level encompasses the highest sections of the mountain with an elevation between 2,800 and 2,400 m. It represents practically leveled terrain with gently folded surface, formed in the place of ancient forest massifs. The next Late Miocene level, the young Miocene, is situated on the main side ridges with an elevation between 2,600 and 2,300 m. The third level formed during the Early Pliocene has an elevation of 1,800 and 1,600 m. The Late Pliocene level occupies areas with an elevation of up to 1,300 m. There are two summits above 2,900 m, Musala and Malka Musala. Some of the highest peaks are: • Musala, • Malka Musala, • Irechek, • Bezimennia Vrah, • Deno, • Studenia Chal, • Golyam Bliznak, • Malak Bliznak, • Mancho, • Pesokliva Vapa, • Ovcharets (Yurushki Chal), • Marishki Chal, • Golyam Kupen, • Malyovitsa, • Sreden Kupen, • Aleko, • Rilets, • Golyam Skakavets, • Popova Kapa, • Lopushki Vrah, • Otovishki Vrah, • Yosifitsa, • Lovnitsa, • Kanarata, • Draganitsa, • Orlovets, • Vodni Chal, • Malak Skakavets, • Zlia Zab, • Damga (Vazov Vrah), • Golyam Kalin, • Ibar, • Dodov Vrah, • Eleni Vrah, • Angelov Vrah, • Ostrets (Sivrichal), • Ravni Chal, • Kovach, • Belmeken, • Dvuglav, • Mermera, • Golyam Mermer, • Haramiyata (Hayduta), == Climate ==

Rila is situated in the southern zone of the humid continental climate region and has typical Alpine climate with elevational zones. The climate is influenced by the Icelandic and the West Mediterranean cyclones, the former mainly in late spring and early summer, and the latter — in winter, bringing frequent and high rainfall, as well as by the Azores and Siberian anticyclones in summer and winter, bringing droughts. The local microclimate is also influenced by the terrain, the exposure of the slopes and the orientation of the valleys. The average temperature decreases and the average precipitation increases with elevation. The coldest month is March and the hottest one August. Negative temperatures remain on average for about nine months in the Alpine zone, often continuing until the end of June. A steady rise in temperature is observed in the middle and end of July. Even during the summer months, temperature over 10 °C do not hold up for long periods. About five to ten days in June, July and August have an average temperature above 15 °C. This determines the short vegetation period in the high elevation areas which varies from three to six months; it lasts about three months at elevation over 2,000 m. The average annual temperature is 2.6 °C on the northern slopes and 3.1 °C on the southern. With an average annual temperature of −3.0 °C, Musala is the coldest place in Bulgaria. the lowest mean monthly temperature was recorded there in February: −11.6 °C. The absolute maximum temperature at Musala is 18.7 °C. Temperature amplitude decreases with elevation from 20 °C at 800 m to 15 °C at 2,800 m. Air humidity in the highlands of Rila ranges between 80 and 85%. The coldest winter months are also the driest. Humidity differs on the northern and southern slopes of Rila. The snow cover above 1,000 m begins to form on 10–15 December on the northern slopes and after 20–30 December on the southern. Its average monthly thickness reaches 20 to 30 cm in February at low elevations. In the Alpine zone above 2,000 m the snow cover is thickest in March, reaching 70 to 80 cm. In the highest ridges the maximum thickness reaches 200 to 240 cm. Winds may reach speed of 40–45 m/s (over 100 km/h) at the summits, with mostly south-western and western orientation. The north-west and north-east winds are more moderate. The average monthly wind speed on the highest mountain summits reaches 11–12 m/s. In the lower parts, the average monthly speed varies from 1.2 to 2.5 m/s and in the middle height zone it ranges from 2.5 to 3.2 m/s. == Hydrology ==

Rila is an important hydrological unit in Bulgaria with very high hydropower potential, representing about 1/4 of the total potential of the country. The water reserves that form within the mountain range are the most important source of clean potable water for the surrounding settlements, the national capital Sofia and part of the population of Northern Greece and European Turkey. The regime of the rivers of Rila is directly related to the elevation and about half of the water reserves in the mountain are at an elevation above 2,050 m. The main drainage divide in the Balkans separating the drainage basins of the Black Sea and the Aegean Sea passes through Rila's northern ridge, including the summit of Musala. The runoff comes from snowmelt in the Alpine zones and rainfall. The largest waterfalls are Skakavitsa (70 m) and Goritsa (39 m). There are abundant mineral springs that include the hottest one in South-eastern Europe at Sapareva Banya forming a geyser with a temperature of 101.4 °C. The cirques at the high elevation zone contain 189 glacial lakes; there are also about 30 smaller ones that evaporate in summer, including tectonic lakes like Panichishte. Their location is closely linked to the snowline during the last glacial period and most of them lie at elevations between 2,100 m and 2,500 m. Most lakes (28) are situated at elevations between 2,300 m and 2,350 m; there are 23 between 2,350 m and 2,400 m, 19 between 2,250 m and 2,300 m and 19 between 2,400 m and 2,450 m. the longest is the Upper Ribno Lake reaching 801 m; the deepest is Okoto, one of the Seven Rila Lakes with a depth of 37.5 m; the highest is Ledeno at an elevation of 2,709 m; the lowest is Suho at 2,045 m. The most important lake groups are the Seven Rila Lakes (seven lakes), Musala Lakes (seven), Marichini Lakes (seven), Urdini Lakes (six), Malyovishki Lakes (three), Elenski Lakes (three), Chanakgyolski Lakes (two), Vapski Lakes (two), etc. == Nature ==

in Rila The vegetation is determined by the elevation. At the lowest portions there are xerothermal oak forests dominated by Hungarian oak (Quercus frainetto), pubescent oak (Quercus pubescens) and Austrian oak (Quercus cerris) with some Mediterranean cenosis of cade juniper (Juniperus oxycedrus) and scorpion senna (Hippocrepis emerus). The forests of coniferous zone between 1,600 m and 2,100 m consist of primarily of Norway spruce (Picea abies), Macedonian pine (Pinus peuce) и Scots pine (Pinus sylvestris). The alpine line is covered with grass, moss, lichen, rare flowers, dwarf willows such as Salix herbacea, Salix retusa and Salix reticulata, etc. Due to the difficult terrain, the forests of Rila are not much influenced by anthropogenic activities and their average age is above 100 years. Some Norway spruces and European silver firs reach height of 60 m. '') The number of vascular plants includes about 1400 species registered only within the territory of Rila National Park, Notable Bulgarian endemic species include Rila primrose (Primula deorum) and rhapontic rhubarb (Rheum rhaponticum); taxa restricted to the Balkans include Bulgarian avens (Geum bulgaricum), yellow columbine (Aquilegia aurea), Bulgarian gentian (Gentianella bulgarica), Balkanian butterwort (Pinguicula balcanica), Crocus veluchensis, Dianthus microlepis, etc. The non-vascular flora includes 974 algae, 313 moss and 251 lichen species. The fungi are represented by 665 species, including 64 mushrooms listed in the Red Book of Bulgaria. The mammal species within Rila National Park and its surroundings are 62 and include taxa of high conservation value, such as brown bear, gray wolf, wildcat, least weasel, European pine marten, marbled polecat, wild boar, red deer, roe deer, chamois, European ground squirrel, as well as the glacial relict European snow vole. The bird species are 156; of the 120 are nesting within Rila National Park. The invertebrate fauna discovered so far includes 4186 species and is expected to rise to over 7000; of them 34 are endemic to Rila, 123 — to Bulgaria and another 123 — to the Balkans. The biodiversity, ecosystems and the pristine landscapes are protected by Rila National Park declared in 1992, which is Bulgaria's largest spanning a territory of 810.46 km2, and Rila Monastery Nature Park covering another 252.535 km2. There are four nature reserves in the former — Parangalitsa, Central Rila Reserve, Ibar and Skakavitsa, and another one, Rila Monastery Forest, in the latter. while the Central Rila Reserve is the largest one in the Balkans with an area of 123.937 km2. == Settlements, transportation and economy ==

Rila is a sparsely populated mountain range with most of the settlements located in the valleys at the foothills, inhabited by c. 250,000 people. Administratively it falls in four of Bulgaria's 28 provinces: Blagoevgrad, Kyustendil, Sofia and Pazardzhik. From west to east there are five towns at the northern foothills — Sapareva Banya (pop. 3,815 as of 2016), Samokov (25,880), The mountain range is served by several roads running along its foothills. No roads traverse the massif. In the west along the Struma Valley runs Struma motorway paralleled by the first class I-1 road, both part of European route E79, that connect the national capital Sofia and Greece via the provincial centre Blagoevgrad. The second class II-62 road branches off I-1 at Dupnitsa and runs east to Samokov where it joins the second class II-82 road which continues in eastern direction until the town of Kostenets, where it joins the first class I-8 road, part of European route E80. The second class II-19 road which branches off I-1 at Simitli, goes east crossing the Predel Saddle into the Razlog Valley and at the homonymous town links with the second class II-84 road which runs in north-eastern direction along the Avramovo Saddle and links with the I-8 road/E80 near Pazardzhik. Rila is served by the Bulgarian State Railways via railway line No. 1 in the north-east with stations at Kostenets and Belovo, railway line No. 5 along the Struma Valley in the west and the Septemvri–Dobrinishte narrow-gauge line in the south-east. Chaira is the largest pumped storage HPP in South-eastern Europe. They form the Belmeken–Sestrimo–Chaira Hydropower Cascade, the biggest and most complex hydroelectric complex in Bulgaria, with a combined installed capacity of 1,599 MW. At an elevation of 1,900 m is located the second biggest reservoir in Rila, Beli Iskar, constructed between 1939 and 1945, that provides 25% of Sofia's potable water and powers a small 16 MW hydro power station. At an elevation of 2,394 m, Kalin is the highest reservoir in the Balkans. == Tourism ==

in winter Rila is a popular tourist destination for winter sports, spa tourism, recreation and cultural tourism. Borovets, situated on the northern slopes at 9 km from Samokov, is the oldest winter resort in Bulgaria and the largest one in Rila. It has 27 marked ski runs with a total length of 58 km equipped with 12 lifts facilities and provides conditions for alpine skiing, cross-country skiing, night skiing, biathlon, snowboard, etc.; it has hosted competitions in the FIS Alpine Ski World Cup and the Biathlon World Championships 1993. The top elevation is 2,560 m while the lowest is 1,300 m. Other much smaller ski resorts include Panichishte with several ski runs, Semkovo with seven ski runs totaling 4 km, Bodrost with 5 km ski runs and Govedartsi with a single 1.7 km ski run. The Balmeken High Mountain Sports Complex is located at an elevation of 2,050 m in East Rila and is used for training, medical and biological research by athletes but also provides opportunities for family recreation. The mountain range was a favourite place of retreat for the Bulgarian monarchs Ferdinand I (r. 1887–1918) and his son Boris III (r. 1918–1943). The palace of Tsarska Bistritsa was constructed between 1898 and 1914 above Borovets in the traditional Bulgarian National Revival style with several edifices and a park. Its 170 kW hydroelectric generator installed in 1912 is still working unaltered. Two other hunting lodges were constructed for the monarchs — Sitnyakovo and Saragyol. There are 198 km primary and 363 km secondary hiking trails in Rila National Park, including E4 European long distance path that traverses it from west to south and E8 European long distance path that traverses it from north-west to south. Rila National Park was visited by about 100,000 tourists annually for the period 2000–2014 reaching a peak of 268,000 in 2012, while with a little more than 1 million visitors Rila Monastery Nature Park is the second most visited one in the country, after Vitosha. In 2000 on the south-western slopes was established the Dancing Bears Park Belitsa that shelters all dancing bears from Bulgaria following the ban of that practice, as well as individuals from Albania and Serbia. The abundant mineral springs along the fault lines along the northern foothills of Rila favour health and spa tourism. The most significant spa resorts from west to east are Sapareva Banya with a total discharge of 33 L/sec and temperature of 33–101.4 °C, Dolna Banya with a total discharge of 22 L/sec and temperature of 56.3 °C and the village of Kostenets with a total discharge of 12 L/sec and temperature of 46–73 °C. Rila has well developed cultural tourism and contains five of the 100 Tourist Sites of Bulgaria — the Church of Theodore Tyro and Theodore Stratelates in the village of Dobarsko, the Rila Monastery and the Stob Earth Pyramids, the Seven Rila Lakes, the museum of history and the convent in the town of Samokov, and the summit of Musala. Rila Monastery is the most important architectural monument in the mountain range. It is situated at an elevation of 1,147 m and was declared a UNESCO's world heritage site in 1983. The Monastery is considered to be a cultural and spiritual centre of Bulgaria. Established in the First Bulgarian Empire by the medieval Bulgarian hermit and saint John of Rila during the reign of emperor Peter I of Bulgaria (r. 927–969), the monastery developed into one of the main cradles of Bulgarian culture, literature and spirituality. In the 18th century it became one of the main hubs of the Bulgarian National Revival. The Church of Saint Nicholas in Sapareva Banya is small medieval edifice, constructed anytime from the 11th to the 14th century. It was built using red bricks and white mortar and is of a simple cross-in-square design, with a single nave and apse. The town of Samokov achieved economic prosperity during the 17–19 centuries due to production of iron and has a number of monuments, including churches, a convent, a 17th-century Ottoman drinking fountain and a museum of history. Near Belchin is located the recently restored Tsari Mali Grad Fortress. == Honour ==

Rila Point on Livingston Island in the South Shetland Islands, Antarctica is named after Rila Mountain. == Gallery ==

File:Central Rila Reserve3.jpg|One of the Musala Lakes File:Okoto lake.jpg|Okoto, Rila's deepest lake File:Rila Mountains, Bulgaria.jpg|A view of Rila File:Image 7 Rila lakes - Bliznaka and Haramiata Peak.jpg|Crocuses next to the Seven Rila Lakes File:Malyovitsa-winter-ifb.JPG|Malyovitsa seen in winter == See also ==