Gaustatoppen

Gaustatoppen is a mountain in the county of Telemark, Norway. The tall mountain is located on the south side of the town of Rjukan and is the highest mountain in Telemark. The summit lies in Tinn Municipality, but there is a lower plateau that crosses the municipal border into Hjartdal Municipality.

The view from the summit is impressive, as one can see an area of approximately , nearly one-sixth of Norway's mainland. The mountain is popular for downhill skiing in the winter, and competitions have been held on its slopes. These competitions include the "Norseman triathlon", billed as "the world's most brutal iron-distance triathlon". It starts in Eidfjord and finishes at the top of Gaustatoppen. The summit is accessible on foot in the summer, on a rocky pathway of medium difficulty, although the southwestern side of the mountain is very dangerous and inaccessible. The wreckage of an airplane crash still lies on that side of the mountain since it is too difficult to remove it.