The Oka (, ) is a

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

Siberia Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part of ...

, left

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...

of the

Angara The Angara ( Buryat and mn, Ангар, ''Angar'', "Cleft"; russian: Ангара́, ''Angará'') is a major river in Siberia, which traces a course through Russia's Irkutsk Oblast and Krasnoyarsk Krai. It drains out of Lake Baikal and is ...

. It is long, and has a drainage basin of .

Course

It originates in the Oka Lake,

Oka Plateau Oka or OKA may refer to: Cars * Oka (automobile), a small car designed by AvtoVAZ and produced by ZMA and SeAZ * OKA 4wd, a large 4-wheel-drive vehicle made in Western Australia by OKA Military * 2B1 Oka, Soviet 420 mm self-propelled mort ...

Sayan Mountains The Sayan Mountains (russian: Саяны ''Sajany''; mn, Соёны нуруу, ''Soyonï nurû''; otk, 𐰚𐰇𐰏𐰢𐰤, Kögmen) are a mountain range in southern Siberia, Russia (Buryatia, Irkutsk Oblast, Krasnoyarsk Krai, Tuva Republic ...

at the western end of

Buryatia Buryatia, officially the Republic of Buryatia (russian: Республика Бурятия, r=Respublika Buryatiya, p=rʲɪsˈpublʲɪkə bʊˈrʲætʲɪjə; bua, Буряад Улас, Buryaad Ulas, , mn, Буриад Улс, Buriad Uls), is ...

. It flows roughly northwestwards with the

Bolshoy Sayan Bolshoi (, meaning ''big'', ''large'', ''great'', ''grand'', etc.) may refer to: *Bolshoi Theatre, a ballet and opera theatre in Moscow, Russia **Bolshoi Ballet, a ballet company at the Bolshoi Theatre *Bolshoi Theatre, Saint Petersburg, a ballet a ...

to the southwest. After it bends northeastwards the river flows between the

Kropotkin Range Kropotkin Range (russian: Хребет Кропоткина) is a mountain range in Bodaybinsky District, Irkutsk Oblast, Russian Federation. The settlements of Kropotkin, Irkutsk Oblast, Kropotkin and Artyomovsky, Irkutsk Oblast, Artyomovsky are ...

and the Belskye Goltsy (Бельские Гольцы). After the Khoyto-Oka tributary joins it from the left it enters

Irkutsk Oblast Irkutsk Oblast (russian: Ирку́тская о́бласть, Irkutskaya oblast; bua, Эрхүү можо, Erkhüü mojo) is a federal subject of Russia (an oblast), located in southeastern Siberia in the basins of the Angara, Lena, and Nizh ...

and flows in a roughly more northern direction. Finally the Oka discharges into the

Bratsk Bratsk ( rus, Братск, p=bratsk) is a types of inhabited localities in Russia, city in Irkutsk Oblast, Russia, located on the Angara River near the vast Bratsk Reservoir. Etymology The name sounds like the Russian word for "brother" ("", '' ...

reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including contro ...

Google Earth Google Earth is a computer program that renders a 3D computer graphics, 3D representation of Earth based primarily on satellite imagery. The program maps the Earth by superimposition, superimposing satellite images, aerial photography, and geog ...

Water of Russia - Ока
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References

Rivers of Irkutsk Oblast Rivers of Buryatia {{Russia-river-stub

Course

See also

References