(also known as Tyra) is a 13 km long creek

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...

 in Frýdek-Místek District

Frýdek-Místek District

Frýdek-Místek District is a district within the Moravian-Silesian Region of the Czech Republic. Its administrative center is the city of Frýdek-Místek. It was created by 1960 reform of administrative divisions...

, Moravian-Silesian Region

Moravian-Silesian Region

Moravian-Silesian Region , or Moravo-Silesian Region, is one of 14 administrative Regions of the Czech Republic, until May 2001 it was formerly called the Ostrava Region . The region is located in the north-eastern part of its historical region of Moravia and in most of the Czech part of the...

, Czech Republic

Czech Republic

The Czech Republic is a landlocked country in Central Europe. The country is bordered by Poland to the northeast, Slovakia to the east, Austria to the south, and Germany to the west and northwest....

, in the historical region of Cieszyn Silesia

Cieszyn Silesia

Cieszyn Silesia or Těšín Silesia or Teschen Silesia is a historical region in south-eastern Silesia, centered around the towns of Cieszyn and Český Těšín and bisected by the Olza River. Since 1920 it has been divided between Poland and Czechoslovakia, and later the Czech Republic...

.

It is the left tributary of the Olza River

Olza River

is a river in Poland and the Czech Republic, the right tributary of the Oder River. It flows from the Silesian Beskids through southern Cieszyn Silesia in Poland and Frýdek-Místek and Karviná districts of the Czech Republic, often forming the border with Poland. It flows into the Oder River north...

, to which it enters in Třinec

Trinec

Třinec is a town in Frýdek-Místek District, Moravian-Silesian Region of the Czech Republic. It lies on the Olza River, in the historical region of Cieszyn Silesia. The town has 37,405 inhabitants as of 2009, in 2001 17.7% of the population were Poles...

. It originates in the Moravian-Silesian Beskids

Moravian-Silesian Beskids

The Moravian-Silesian Beskids is a mountain range in the Czech Republic with a small part reaching to Slovakia. It lies on the historical division between Moravia and Silesia, hence the name...

 in the elevation of 835 m and flows generally northward through the villages of Tyra

Tyra (Trinec)

is a village in Frýdek-Místek District, Moravian-Silesian Region, Czech Republic. It was a separate municipality but became administratively a part of Třinec in 1980. Tyrka flows through the village. It has a population of 445 and lies in the historical region of Cieszyn Silesia....

 and Oldřichovice

Oldrichovice (Trinec)

is a village in Frýdek-Místek District, Moravian-Silesian Region, Czech Republic. It was a separate municipality but became administratively a part of Třinec in 1980. It has a population of 3,182 . and lies in the historical region of Cieszyn Silesia. Tyrka flows through the village.- References :...

. Tyrka also flows through the territory of the Třinec Iron and Steel Works

Trinec Iron and Steel Works

Třinec Iron and Steel Works is a producer of long rolled steel products in Třinec, Moravian-Silesian Region, Czech Republic. TŽ produces over a third of all steel produced in the Czech Republic . Since its establishment, Třinecké železárny's plants have produced more than 150 million tons of...

before joining Olza.