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Trillemarka Nature Reserve
Trillemarka langseterfjell.jpg
Trilledalen seen from Langseterfjell
Map showing the location of Trillemarka Nature Reserve
Map showing the location of Trillemarka Nature Reserve
Location within Norway
Location Sigdal, Buskerud, Norway
Nearest city Drammen
Coordinates 60°05′46″N 9°13′48″E / 60.096°N 9.23°E / 60.096; 9.23[1]Coordinates: 60°05′46″N 9°13′48″E / 60.096°N 9.23°E / 60.096; 9.23[1]
Area 147 km2 (57 sq mi)
Established 2008
Governing body Directorate for Nature Management

Trillemarka (Trillemarka - Rollagsfjell) is a 147 km2 (57 sq mi) nature reserve located in Buskerud, Norway. It was created on December 13, 2002 and is located in the hill- and mountain areas between Nore in Numedal and Solevann in Sigdal, partially in the municipalities of Sigdal, Nore og Uvdal, and Rollag. The nature reserve consists of one of the largest natural forest areas in central Østlandet and includes virgin forest and 93 red list species.

The Norwegian government decided on January 8, 2008 that 147 km2 (57 sq mi) is to be protected. The landowners received NOK 100 million in compensation.[2]


There has been a large controversy between environmentalists and the owners of the forest. As a consequence of the debate there has been suggested four different sizes for an expansion of the nature reserve:

  1. 205–210 km² (suggested by the Norwegian Institute for Nature Research, supported by environmentalists)
  2. 169 km² (suggested by the governor)
  3. 147 km² (suggested by the governor)
  4. 99 km² (suggested by the forest owners)

Among the environmentalist organizations that have taken an interest in Trillemarka, are Natur og Ungdom,[3] WWF,[4][5] and Friends of the Earth, Norway.[6]


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