It branched from the Gamlebyen Line in Schweigaards gate and ran into the neighborhoods of Vålerenga, Etterstad and Helsfyr.

With the reduction in traffic, the Vålerenga Line was closed on 23 June 1968, as part of a citywide gradual closure of the tramway.

[3] Kristiania Sporveisselskab and later Oslo Sporveier operated Vålerenga Depot in conjunction with the line.

Kristiania Sporveisselskab carried out an electrification of its system from 1897;[6] this was completed on 14 January 1900 when the Oslo Line was finished converted.

[3] As part of the opening the tracks were from 18 February 1923 rearranged so that northeast-bound trains ran through Vålerengagata and in the other direction through Strømsveien.

[2] KSS merged in May 1924 to create Oslo Sporveier and it took over services on the Vålerenga Line.

The issue was driven by the lack of a suitable turning loop with free capacity in the city center.

To aid transport, the city council voted on 9 December 1954 to build the Lambertseter Line from Bryn to Bergkrystallen.

[11] The city council voted in 1960 to gradually close the tramway and instead rely on diesel buses and the metro.

[12] The Lambertseter Line was closed for tram traffic on 18 May 1966 and opened as part of the metro five days later.

The closing of the line allowed the company to retire all its twin-axle stock without ordering new trams.