Kolsås (Norwegian pronunciation: [ˈkôɫsoːs] ), sometimes called Kolsaas, is a hill in the municipality of Bærum, Norway. Geologically, Kolsås belongs to the Oslo Graben area. Its two peaks consist of hard rhomb porphyric lava covering softer rocks, forming steep cliffs to the east, south and west.
An old farm beneath the mountain has the name Kolsberg. The first element in this name is the genitive case of the old male name Kolr, and the last element is berg n 'mountain'. The parish and municipality of Bærum (Old Norse Bergheimr) is probably named after this prominent mountain. The last element in the name of the mountain was later changed to ås m 'mountain ridge' to distinguish it from the name of the farm.
The area from Kolsås to Dælivannet is a protected landscape area from 1978 (five square kilometers), with four nature reserves: Skotta, Dalbo, Kolsåsstupene and Kolsåstoppen nature reserve. [1] [2]
Kolsås has been a training area for climbers since beginning of the 20th century. Today it is the largest rock climbing area in the Oslo region. The wall Øvre Sydstup on the southern wall has more than 200 climbing routes. [3] [4]
The northern hillside of Kolsås has alpine skiing facilities.
Kolsåsbanen is part of the subway rail system Oslo T-bane, running from downtown Oslo to Kolsås station, via Gjettum station and Hauger station.
The military base Kolsås leir, partly located inside the mountain, was home of NATO's Allied Forces Northern Europe (AFNORTH) until 1994. [5]
The area has occurrences of old petroglyphs, tumuli and limestone quarries.
The French painter Claude Monet painted Mont Kolsaas in 1895. [6]
Bærum is a municipality in the Greater Oslo Region in Akershus County, Norway. It forms an affluent suburb of Oslo on the west coast of the city. Bærum is Norway's fifth largest municipality with a population of 128,760 (2021). The administrative centre of the municipality is the town of Sandvika. Bærum was established as a municipality on 1 January 1838.
Fornebu is a peninsular area in the suburban municipality of Bærum in Norway, bordering western parts of Oslo.
Sandvika is the administrative centre of the municipality of Bærum in Norway. It was declared a city by the municipal council in Bærum on 4 June 2003.
Ullern is a borough of the city of Oslo, Norway.
The Oslo Metro is the rapid transit system of Oslo, Norway, operated by Sporveien T-banen on contract from the transit authority Ruter. The network consists of five lines that all run through the city centre, with a total length of 85 kilometres (53 mi), serving 101 stations of which 17 are underground or indoors. In addition to serving 14 out of the 15 boroughs of Oslo, two lines run to Kolsås and Østerås, in the neighbouring municipality of Bærum. In 2016, the system had an annual ridership of 118 million.
The Røa Line is a rapid transit line of the Oslo Metro, Norway, which runs from Majorstuen in Oslo to Østerås in Bærum. It serves neighborhoods such as Smestad, Hovseter, Huseby and Røa in northwestern Oslo, and Grini, Øvrevoll and Østerås in northeastern Bærum. The line is served by Line 2 of the metro, which connects to the city center via the Common Tunnel and onwards along the Furuset Line. The lowest part of the Røa Line, consisting of two stations, is shared with the Kolsås Line, and thus also served by Line 2 of the metro. The Røa Line is owned by Kollektivtransportproduksjon, and operated by Oslo T-banedrift on contract with the public transport agency Ruter.
The Kolsås Line is a 12.1-kilometer (7.5 mi) line of the Oslo Metro. It branches off from the Røa Line at Smestad Station and runs through western Oslo and Bærum to Kolsås Station. It serves the neighborhoods of Ullernåsen, Øraker, Jar, Bekkestua, Haslum, Gjettum and Kolsås. It is served by Line 3 of the metro at a 15-minute headway. The section from Jar to Bekkestua is built as a dual system with overhead wires, allowing Line 13 of the Oslo Tramway to continue from the Lilleaker Line to Bekkestua every ten minutes.
Bjørnsletta was a station on the Kolsås Line of the Oslo Metro in Norway. Located between the Åsjordet and Lysakerelven stations in the Ullern borough, Bjørnsletta was—along with Frøen—the only station on the subway network lacking step-free access to the platforms. The station was opened on 15 June 1942 when the line from Sørbyhaugen to Jar had been completed. Along with most of the line, Bjørnsletta was closed for upgrades on 1 July 2006; passenger service was temporarily provided by bus line 43. When the renovation was finished on 17 August 2010, Bjørnsletta and Lysakerelven stations were replaced by a new station, also named Bjørnsletta, placed in between.
Egne hjem was an Oslo Metro and Oslo Tramway station on the Kolsås Line located in Bærum, Norway. The station was situated between Ringstabekk and Bekkestua, 10.8 kilometres (6.7 mi) from Stortinget.
The Lilleaker Line is a suburban tramway from Skøyen in Oslo westwards to Jar, Bærum in Norway. It is operated by Line 13 from Ljabru to Bekkestua of the Oslo Tramway, operated by Oslo Sporvognsdrift. The line continues on the Oslo Metro west of Jar as part of the Kolsås Line, and as a street tramway on the Oslo tramway system at Skøyen as the Skøyen Line.
Gjønnes is a rapid transit station of the Oslo Metro's Kolsås Line, situated in the Bærum, Norway, neighborhood of Gjønnes, just west of Bekkestua. Located 11.8 kilometers (7.3 mi) from Stortinget, the station is served by Line 3 of the metro, normally with a fifteen-minute headway. Travel time to Stortinget is 22 minutes. The station is a popular park and ride site, with 200 parking places.
Bjørnsletta is a station on the Kolsås Line of the Oslo Metro. It serves the residential area of Øraker in Oslo, Norway and is served by Line 3. The station opened on 17 August 2010 and replaced two former stations: Bjørnsletta and Lysakerelven. Both these stations were closed in 2006 while the Kolsås Line was being upgraded from a light rail to a rapid transit. Bjørnsletta is 8.2 kilometres (5.1 mi) from Stortinget.
Volvat was a rapid transit station of the Oslo Metro's Røa Line and Kolsås Line. Situated in the neighborhood of Volvat in Vestre Aker borough of Oslo, Norway, it was the sole underground station on the western part of the metro. It was located 3.4 kilometers (2.1 mi) from Stortinget.
Ringstabekk is a district in Bærum, Norway. Named after the local farm, the district is also known for its schools and the sports field. The sports club Stabæk IF originates in the area.
Ramstad is a district in central Bærum, Norway. It is known mainly for its school and a former station on the Drammen Line.
Gjønnes is a district in eastern Bærum, Norway.
Gjettum is a neighbourhood in Bærum, Akershus, Norway. It is located south of Kolsås. The area is named after the Gjettum farm.
The Mount Kolsaas series of oil paintings was created by the French Impressionist painter Claude Monet in 1895.