Bolva is a river in Kaluga

Kaluga Oblast

Kaluga Oblast is a federal subject of Russia . Its administrative center is the city of Kaluga.-Geography:Kaluga Oblast is located in the central part of the East European Plain. The Smolensk Highland lays in the western and north-western part of the oblast, while the Central Russian Highland -...

 and Bryansk Oblast

Bryansk Oblast

Bryansk Oblast is a federal subject of Russia . Its administrative center is the city of Bryansk. Population: 1,278,087 .-History:...

s in 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...

. It 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 Desna River

Desna River

Desna is a river in Russia and Ukraine, left tributary of the Dnieper. The word means "right hand" in the Old East Slavic language. Its length is , and its drainage basin covers ....

. It is 213 km in length, with a drainage basin

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 of 4340 km².

The river has its sources on the Smolensk Ridge, and flows in a southerly direction to its confluence with the Desna in the city of Bryansk

Bryansk

Bryansk is a city and the administrative center of Bryansk Oblast, Russia, located southwest of Moscow. Population: -History:The first written mention of Bryansk was in 1146, in the Hypatian Codex, as Debryansk...

. The river also flows through the towns of Dyatkovo

Dyatkovo

Dyatkovo is a town and the administrative center of Dyatkovsky District of Bryansk Oblast, Russia. Population: -History:It was first mentioned in 1626. In 1938, it was granted town status....

, Fokino

Fokino, Bryansk Oblast

Fokino is a town in Dyatkovsky District of Bryansk Oblast, Russia, located on the Bolva River north of Bryansk. Population: Town status was granted to it in 1954....

, Kirov

Kirov, Kaluga Oblast

Kirov , formerly known as Pesochnya , is a town in Kaluga Oblast, Russia, located on the Bolva River southwest of Kaluga. Population: 31,888 ; 38,893 ; 29,000 . It is home to Shaykovka air base....

 and Lyudinovo

Lyudinovo

Lyudinovo is a town in Kaluga Oblast, Russia, located on the shores of the Lake Lompad formed by a dam on the Nepolot River. Lyudinovo is situated north of Bryansk and southwest of Kaluga. It serves as the administrative center of Lyudinovsky District, although it is not administratively a part...

.

In the 19th century, the river vas navigable between Dyatkovo and Brjansk.