Lega is a river in

Poland Poland, officially the Republic of Poland, , is a country in Central Europe. Poland is divided into Voivodeships of Poland, sixteen voivodeships and is the fifth most populous member state of the European Union (EU), with over 38 mill ...

, a right tributary of the river

Biebrza Biebrza ( lt, Bebras, '' be, Bobra'', ''german: Bober'') is a river in northeastern Poland, a tributary of the Narew river (near Wizna), with a length of and a basin area of 7,092 km2 (7,067 in Poland).Warmian-Masurian and

Podlaskie Voivodeship Podlaskie Voivodeship or Podlasie Province ( pl, Województwo podlaskie, ) is a voivodeship (province) in northeastern Poland. The name of the province and its territory correspond to the historic region of Podlachia. The capital and largest cit ...

s. Its source is near the village of Szarejki.

Geography

It passes through the

Great Olecko Lake Great may refer to: Descriptions or measurements * Great, a relative measurement in physical space, see Size * Greatness, being divine, majestic, superior, majestic, or transcendent People * List of people known as "the Great" *Artel Great (born ...

and the Small Olecko Lake at Olecko, and flows into the lake Selmęt Wielki east of Ełk. It continues to the lake Stackie, which is connected with the lake Rajgrodzkie, under the name ''Małkiń''. It flows out of Rajgrodzkie at

Rajgród Rajgród is a town in Grajewo County, Podlaskie Voivodeship, Poland, with 1,609 inhabitants (as of June 2016), within the historic region of Podlachia. History Rajgród has a long and rich history, with evidence of human habitation dating back ...

, and continues under the name ''Jegrznia''. It passes through the lake Dręstwo and flows into the Biebrza near Goniądz. Rivers of Poland Rivers of Podlaskie Voivodeship Rivers of Warmian-Masurian Voivodeship {{Poland-river-stub