The R21 highway (in Cyrillic Р21), also known as the

Kola KOLA (99.9 FM) is a commercial radio station licensed to Redlands, California, and broadcasting to the Riverside-San Bernardino-Inland Empire radio market. It is owned by the Anaheim Broadcasting Corporation and it airs a classic hits radio form ...

Motorway, is a major

highway A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-access ...

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-ei ...

, running from

Saint Petersburg Saint Petersburg ( rus, links=no, Санкт-Петербург, a=Ru-Sankt Peterburg Leningrad Petrograd Piter.ogg, r=Sankt-Peterburg, p=ˈsankt pʲɪtʲɪrˈburk), formerly known as Petrograd (1914–1924) and later Leningrad (1924–1991), i ...

to Murmansk. The highway is part of European route E105 and is the main transportation route by road in the

Republic of Karelia The Republic of Karelia (russian: Респу́блика Каре́лия, Respublika Kareliya; ; krl, Karjalan tašavalta; ; fi, Karjalan tasavalta; vep, Karjalan Tazovaldkund, Ludic: ''Kard’alan tazavald''), also known as just Karelia (ru ...

and the

Murmansk Oblast Murmansk Oblast (russian: Му́рманская о́бласть, p=ˈmurmənskəjə ˈobləsʲtʲ, r=Murmanskaya oblast, ''Murmanskaya oblast''; Kildin Sami: Мурман е̄ммьне, ''Murman jemm'ne'') is a federal subject (an oblast) o ...

. Its length is 1592 kilometers. Before 2018, the R21 was designated as M18.

Route

The R21 highway runs from Saint Petersburg, south of

Lake Ladoga Lake Ladoga (; rus, Ла́дожское о́зеро, r=Ladozhskoye ozero, p=ˈladəʂskəjə ˈozʲɪrə or rus, Ла́дога, r=Ladoga, p=ˈladəɡə, fi, Laatokka arlier in Finnish ''Nevajärvi'' ; vep, Ladog, Ladoganjärv) is a fresh ...

Petrozavodsk Petrozavodsk (russian: Петрозаводск, p=pʲɪtrəzɐˈvotsk; Karelian, Vepsian and fi, Petroskoi) is the capital city of the Republic of Karelia, Russia, which stretches along the western shore of Lake Onega for some . The population ...

, Kondopoga,

Medvezhyegorsk Medvezhyegorsk (russian: Медвежьего́рск; krl, Karhumägi; fi, Karhumäki) is a town and the administrative center of Medvezhyegorsky District of the Republic of Karelia, Russia. Population: 15,800 (1959). History A village i ...

Segezha Segezha (russian: Сеге́жа; krl, Segeža; fi, Sekehe) is a town and the administrative center of Segezhsky District of the Republic of Karelia, Russia, located north of Petrozavodsk on the Segezha River and on the western shore of Lak ...

, Kem, Loukhi, Kandalaksha, Polyarnye Zori, Monchegorsk, Olenegorsk,

and ends in

Severomorsk Severomorsk (russian: Северомо́рск), known as Vayenga () until April 18, 1951, is a closed town in Murmansk Oblast, Russia. Severomorsk is the main administrative base of the Russian Northern Fleet. The town is located on the coast o ...

. It passes the

Arctic circle The Arctic Circle is one of the two polar circles, and the most northerly of the five major circles of latitude as shown on maps of Earth. Its southern equivalent is the Antarctic Circle. The Arctic Circle marks the southernmost latitude at ...

a couple of kilometers south of the border of Karelia and the Murmansk oblast, north of Loukhi.

Landscape

In the Republic of Karelia, the landscape through which the R21 runs is mainly forest (

birch A birch is a thin-leaved deciduous hardwood tree of the genus ''Betula'' (), in the family Betulaceae, which also includes alders, hazels, and hornbeams. It is closely related to the beech- oak family Fagaceae. The genus ''Betula'' cont ...

es), rivers and lakes. In the Murmansk Oblast, the highway runs for the most part through the

Kola Peninsula The Kola Peninsula (russian: Кольский полуостров, Kolsky poluostrov; sjd, Куэлнэгк нёа̄ррк) is a peninsula in the extreme northwest of Russia, and one of the largest peninsulas of Europe. Constituting the bulk ...

, a severely polluted area. The landscape here is more open and consists partly of half-

tundra In physical geography, tundra () is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. The term ''tundra'' comes through Russian (') from the Kildin Sámi word (') meaning "uplands", "treeless mou ...

. Roads within the Arctic Circle Roads in Saint Petersburg Roads in Leningrad Oblast Roads in the Republic of Karelia Roads in Murmansk Oblast {{Russia-road-stub