Places > East > Lónsheiði Lónsheiði Lónsheiði, (389 m) the mountain track and road between Álftafjörður and Lón, 18 km long. A rock, Sýslusteinn, marks the boundary of the counties Suður–Múlasýsla and Austur–Skaftafellssýsla. This road is no longer in use.