Blefjell is a southeastern spur of the Hardangervidda. In eight days you can walk south, starting in Immingfjell and ending in the town of Kongsberg where the trail ends. In between you will pass three unstaffed huts, two self-service cabins where you can buy food, and a private cabin.

The vegetation is rather sparse, as a consequence of the poor quartzite soil. As you progress south, following the crest of the Blefjell range, the mountains get lower. Halfway, Blefjell peak itself arises above the landscape to 1351 meters.