Svartisen, north west of Mo i Rana, is a large glacier – Svartisen means "black ice" – the largest of north Norway. Climbing it is not exactly a walking exercise. The ice is heavily crevassed and only mountaineers or guided parties should attempt to traverse it. The surroundings are fine for hiking, although there are not many huts here. A deep valley splits the ice field in two. Around it many lakes can be found.