The valley is wide and fertile at its mouth until its intersection with Öxnadalur; the area on the east side of the river here is known as Þelamörk (Thelamörk). The rest of the valley is narrow and has little flat land, running between high mountains. On the west side they reach , and in the Drangafjall ridge dividing the valley from Öxnadalur, the pointed peak of Hraundrangi (lava column) stands out. The main intersecting valleys in the interior are Barkárdalur and Myrkárdalur.