The Uy (, ) is a

river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...

Chelyabinsk Oblast Chelyabinsk Oblast; , is a federal subjects of Russia, federal subject (an oblast) of Russia in the Ural Mountains region, on the border of Europe and Asia. Its administrative center is the types of inhabited localities in Russia, city of Chel ...

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

with its upper reaches in

Bashkortostan Bashkortostan, officially the Republic of Bashkortostan, sometimes also called Bashkiria, is a republic of Russia between the Volga river and the Ural Mountains in Eastern Europe. The republic borders Perm Krai to the north, Sverdlovsk Oblast ...

. It partially flows along the

borders A border is a geographical boundary. Border, borders, The Border or The Borders may also refer to: Arts, entertainment and media Film and television * ''Border'' (1997 film), an Indian Hindi-language war film * ''Border'' (2018 Swedish film), ...

of Chelyabinsk and

Kurgan Oblast Kurgan Oblast () is a federal subject of Russia (an oblast). Its administrative center is the city of Kurgan. According to the 2021 Census, the population was 776,661, down from 910,807 recorded in the 2010 Census. History Formed by De ...

s with

Kazakhstan Kazakhstan, officially the Republic of Kazakhstan, is a landlocked country primarily in Central Asia, with a European Kazakhstan, small portion in Eastern Europe. It borders Russia to the Kazakhstan–Russia border, north and west, China to th ...

. The Uy is a left tributary of the

Tobol The Tobol (, ) is a river in Western Siberia (in Kazakhstan and Russia) and the main (left) tributary of the Irtysh. Its length is , and the area of its drainage basin is . History The Tobol River was one of the four important rivers of the S ...

.Уй (река в Челябинской обл.)

Great Soviet Encyclopedia The ''Great Soviet Encyclopedia'' (GSE; , ''BSE'') is one of the largest Russian-language encyclopedias, published in the Soviet Union from 1926 to 1990. After 2002, the encyclopedia's data was partially included into the later ''Great Russian Enc ...

The length of the river is 462 km. The area of its basin is 34,400 km². It freezes up in November and stays icebound in April. The town of

Troitsk Troitsk (, ''Tróick'') is the name of several types of inhabited localities in Russia, inhabited localities in Russia. Modern localities ;Urban localities *Troitsk, Chelyabinsk Oblast, a town in Chelyabinsk Oblast; *Troitsk, Moscow, a town in Tro ...

and three

reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

s (the largest being Troitsk Reservoir) are situated on the Uy. It rises in the southern

Ural Mountains The Ural Mountains ( ),; , ; , or simply the Urals, are a mountain range in Eurasia that runs north–south mostly through Russia, from the coast of the Arctic Ocean to the river Ural (river), Ural and northwestern Kazakhstan.

east of the headwaters of the Ural between

Chelyabinsk Chelyabinsk; , is the administrative center and largest types of inhabited localities in Russia, city of Chelyabinsk Oblast, Russia. It is the List of cities and towns in Russia by population, seventh-largest city in Russia, with a population ...

and

Magnitogorsk Magnitogorsk ( rus, Магнитого́рск, p=məɡnʲɪtɐˈɡorsk, ) is an industrial city in Chelyabinsk Oblast, Russia, on the eastern side of the extreme southern extent of the Ural Mountains by the Ural River. Its population is curre ...

and flows east with many meanders past

to meet the

near Zverinogolovskoye (formerly the fort of Ust-Uysk). The gold-mining town of

Plast The Plast National Scout Organization of Ukraine (), commonly called Ukrainian Plast or simply , is the largest Scouting organization in Ukraine. History First Era: 1911–1920 Plast was founded in Lviv (Lwów, Lemberg), Austro-Hungarian Ga ...

is on its headwaters. At the time of the Bashkir War of 1735-40 it was the eastern end of the Orenburg Line of forts and is now approximately part of the border between Russia and Kazakhstan. The Uy is the southernmost river on the east side of the Urals whose waters ultimately reach the Arctic Ocean. South of the Uy waters run to the river Ural which flows south into the Caspian Sea. The name of the river comes from the

Bashkir language Bashkir ( , ) or Bashkort (, ) is a Turkic languages, Turkic language belonging to the Kipchak languages, Kipchak branch. It is official language#Political alternatives, co-official with Russian language, Russian in Bashkortostan. Bashkir has ap ...

, in which it means "valley, lowland".

References

Rivers of Chelyabinsk Oblast Rivers of Bashkortostan Rivers of Kurgan Oblast Rivers of Kazakhstan Border rivers International rivers of Asia Kazakhstan–Russia border {{Kazakhstan-river-stub