Protva

This article is about a river. For the place, see Zhukov, Kaluga Oblast.

The Protva (Russian: Протва) is a river in the Moscow and Kaluga oblasts in Russia. It is a left tributary of the Oka. It is 282 kilometres (175 mi) long, and has a drainage basin of 4,620 square kilometres (1,780 sq mi).^[1] The area of its basin is 4,620 square kilometres (1,780 sq mi). The Protva freezes up in early December and stays icebound until early April. Its main tributary is the Luzha. The towns of Vereya, Borovsk, Protvino and Obninsk are located on the shores of the Protva.

Protva
Protva River in Borovsk
Native name	Протва (Russian)
Location
Country	Russia
Physical characteristics
Mouth	Oka
• coordinates	54°51′36″N 37°09′45″E
Length	282 km (175 mi)
Basin size	4,620 km2 (1,780 sq mi)
Basin features
Progression	Oka→ Volga→ Caspian Sea
Tributaries
• right	Luzha