120 km (75 mi) as part of the system The Piva (Cyrillic: Пива, pronounced [pîʋa]) is a river in Montenegro and Bosnia and Herzegovina.

The Tušina originates from the mountain Sinjajevina in the Uskoci region of central Montenegro, just few kilometers away from the source of another important Montenegrin river, Morača.

The river flows to the west, between the Sinjajevina and Lola mountains, next to the villages of Krnja Jela, Bare, Boan and Tušina.

After the dam, the Piva continues straight to the north, meets the Tara at Šćepan Polje on the border with Bosnia and Herzegovina and creates the Drina.

Pivska Površ (Cyrillic: Пивска Површ), is a high limestone plateau in the drainage area of Piva, between the mountains of Durmitor, Maglić, Lebršnik, Golija and Vojnik.