The Izhora also known as Inger River, is a left tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Neva River

Neva River

The Neva is a river in northwestern Russia flowing from Lake Ladoga through the western part of Leningrad Oblast to the Neva Bay of the Gulf of Finland. Despite its modest length , it is the third largest river in Europe in terms of average discharge .The Neva is the only river flowing from Lake...

 on its run through Ingria

Ingria

Ingria is a historical region in the eastern Baltic, now part of Russia, comprising the southern bank of the river Neva, between the Gulf of Finland, the Narva River, Lake Peipus in the west, and Lake Ladoga and the western bank of the Volkhov river in the east...

 in northwestern Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 from Lake Ladoga

Lake Ladoga

Lake Ladoga is a freshwater lake located in the Republic of Karelia and Leningrad Oblast in northwestern Russia, not far from Saint Petersburg. It is the largest lake in Europe, and the 14th largest lake by area in the world.-Geography:...

 to Gulf of Finland

Gulf of Finland

The Gulf of Finland is the easternmost arm of the Baltic Sea. It extends between Finland and Estonia all the way to Saint Petersburg in Russia, where the river Neva drains into it. Other major cities around the gulf include Helsinki and Tallinn...

. A settlement of Ust-Izhora

Ust-Izhora

Ust-Izhora is a municipal settlement in Kolpinsky District of the federal city of St. Petersburg, Russia, situated at the confluence of the Izhora and Neva Rivers, and is roughly equidistant to Saint Petersburg and Schlisselburg, Russia, from both the Gulf of Finland in the west and Lake...

 (lit. "mouth of Izhora") is situated at the confluence of Izhora and Neva, halfway between Saint Petersburg

Saint Petersburg

Saint Petersburg is a city and a federal subject of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea...

 and Schlisselburg. The town of Kolpino

Kolpino

Kolpino is a municipal city in Kolpinsky District of the federal city of St. Petersburg, Russia, located on the Izhora River southeast of St. Petersburg proper. Population: 81,000 ; 8,076 ....

 is located on the Izhora as well. The river is noted as the farthest Swedish

Lands of Sweden

The lands of Sweden are three traditional parts, essentially three collectives of provinces, in Sweden. These "lands" have no administrative function, and there is no official designation for this subdivision level...

 forces ever reached between the Viking Age

Viking Age

Viking Age is the term for the period in European history, especially Northern European and Scandinavian history, spanning the late 8th to 11th centuries. Scandinavian Vikings explored Europe by its oceans and rivers through trade and warfare. The Vikings also reached Iceland, Greenland,...

 and the Time of Troubles

Time of Troubles

The Time of Troubles was a period of Russian history comprising the years of interregnum between the death of the last Russian Tsar of the Rurik Dynasty, Feodor Ivanovich, in 1598, and the establishment of the Romanov Dynasty in 1613. In 1601-1603, Russia suffered a famine that killed one-third...

.

Izhora's calculated length is 76 kilometers. The river draws its water mainly from natural groundwater springs, snow melt, and rain water. The river has a sustainable underground water supply in both summer and winter, never drying up or freezing through.