Borgen is a station shared by the Røa Line (line 2) and the Kolsås Line (line 6) on the Oslo T-bane

Oslo T-bane

The Oslo Metro is the rapid transit system of Oslo, Norway, operated by Oslo T-banedrift on contract from the transit authority Ruter. The network consists of six lines that all run through the city centre, with a total length of . It has a daily ridership of 268,000 with 105 stations of which 16...

 system. The station is between Majorstuen

Majorstuen (station)

Majorstuen is a subway station on the Oslo Metro and a light rail station on the Briskeby Line of the Oslo Tramway. It is located in the Majorstuen neighborhood in the Frogner borough....

 and Smestad

Smestad (station)

Smestad is a station shared by the Røa Line and the Kolsås Line on the Oslo T-bane system. Although the two lines continue to share track some time after Smestad, passing the former station of Sørbyhaugen which was also shared, they diverge before passing another station...

, and 3.8 km from the central station Stortinget

Stortinget (station)

Stortinget is an underground rapid transit station on the Common Line of the Oslo Metro, Norway. It is located in the heart of the city center, next to Stortinget, the Parliament of Norway. The station is served by all six lines of the metro. At the street level, the station serves tram routes 17,...

.

The station is located on a stretch where the line runs alongside Sørkedalsveien. The large Vestre gravlund

Vestre gravlund

Vestre gravlund is a cemetery in the Frogner borough of Oslo, Norway, located next to the Borgen metro station. At , it is the largest cemetery in Norway...

 cemetery is situated to the south of the station.

The station was opened on 17 November 1912 as part of a branch line

Branch line

A branch line is a secondary railway line which branches off a more important through route, usually a main line. A very short branch line may be called a spur line...

 to Holmenkollbanen

Holmenkollbanen

The Holmenkollen Line is an long line of the Oslo Metro between Majorstuen and Nordmarka in Oslo, Norway. It is served by Line 1 of the metro, and is the line with the least passengers and the only to still have level crossings and short station platforms...

which went to Smestad and was later extended. There were originally four stations on this line, but only Borgen and Smestad remain. The two stations which originally neighbored Borgen, Volvat in the east and Heggeli in the west, are both closed.