The pure, cold waters of this river flow down from the glacial Diarfell Lake nestled between the Stahlgaard Mountains, making its way southwest for several miles before splitting into two channels. The southwestern channel, known simply as the West (or Western) Samark, winds its way southwest for about a dozen or so miles before turning sharply to the northwest and fading into the mists. Nestled between a small smattering of scattered hills, studded with moss- and lichen-festooned rocky outcrops, its swampy banks often feature boggy patches of moorland shrouded by frequent mists. The southeastern channel, known simply as the East (or Eastern) Samark, on the other hand, makes its way southeast for several miles through a patch of rocky shrublands dotted with several small thickets and woodland clusters before merging with the Kaskin River from the east. Its waters are generally slow-moving but surprisingly deep, especially in the west. Catfish and trout abound where the river meets the forest, though fishing is otherwise fair for most of its length.