Rila

Rila (Bulgarian: Рила, pronounced [ˈriɫɐ]) is the highest mountain range of Bulgaria, the Balkan Peninsula, and of Southeast Europe. It is situated in southwestern Bulgaria and forms part of the Rila–Rhodope Massif. The highest summit is Musala at an elevation of 2,925 m which makes Rila the sixth highest mountain range in Europe after the Caucasus, the Alps, Sierra Nevada, the Pyrenees and Mount Etna, and the highest one between the Alps and the Caucasus. It spans a territory of 2,629 km² with an average elevation of 1487 m. The mountain is believed to have been named after the river of the same name, which comes from the Old Bulgarian verb "рыти" meaning "to grub".

Rila has abundant water resources. Some of the Balkans' longest and deepest rivers originate from Rila, including the Maritsa, Iskar and Mesta rivers. Bulgaria's main water divide separating the Black Sea and the Aegean Sea drainage systems follows the main ridge of Rila. The mountain range is dotted with almost 200 glacial lakes such as the renowned Seven Rila Lakes, and is rich in hot springs in the fault areas at the foothills, including the hottest spring in South-eastern Europe in Sapareva Banya.

The mountain range has varied flora and fauna with a number of endemic and relict species and some of the best preserved forests in the country. The biodiversity and the pristine landscapes are protected by Rila National Park which covers much of the mountain; the rest lies within Rila Monastery Nature Park. In addition, there are five nature reserves: Parangalitsa, Central Rila Reserve, Rila Monastery Forest, Ibar and Skakavitsa.

The most recognisable landmark of the mountain range is the Rila Monastery, Bulgaria's largest and most important monastery, founded in the 10th century by Saint John of Rila. Due to its outstanding cultural and spiritual value it was declared a UNESCO World Heritage Site in 1983. Rila is also a popular destination for hiking, winter sports and spa tourism, hosting the nation's oldest ski resort Borovets, as well as numerous hiking trails. Some of the most important hydro power stations in Bulgaria are situated in the eastern part of the mountain range, including the Belmeken–Sestrimo–Chaira Hydropower Cascade (1,599 MW), the largest and most complex hydroelectric complex in Bulgaria.

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.

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. It covers 37% of the mountain's territory and contains the highest summit in the range — Musala (2,925 m), as well as 12 of the 18 summits over 2,700 m — Irechek (2,852 m), Deno (2,790 m), Mancho (2,771 m) and others; there are 46 peaks over 2,100 m. East Rila contains a number of glacial lake groups, including Musala Lakes and Marichini Lakes, as well as the nation's largest ski resort Borovets.

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. It stretches between the valleys of the rivers Beli Iskar, Cherni Iskar, Levi Iskar, Iliyna and Rilska. The later divides the two main ridges in Central Rila, Skakavitsa and Rilets. The highest summit is Cherna Polyana (2,716 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.