Trillemarka

Trillemarka (Trillemarka-Rollagsfjell) is a 147 km (57 mi) nature reserve located in Buskerud, Norway. It was created on December 13, 2002, and is located in the hilly and mountainous areas between Nore in Numedal and 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 km (57 mi) were to be protected. The landowners received NOK 100 million in compensation.