The Iggnir River is a river that runs through Solstheim. Its source is Lake Fjalding and it flows south from there into the Sea of Ghosts, separating Hirstaang Forest from Isinfier Plains.
When the eruption of Red Mountain Occurred, there was significant upheaval in the area of the river, causing a large swath of it to instead move underground. As of 4E 201, the river surfaces as a small stream in Usha's Camp, carrying a small quantity of gold in the stream.