The general geography of this map is based on early sketch-maps of the world reproduced in volume IV of The History of Middle-earth. However, even those old maps do not specifically mark the location of Utumno, so the position shown here is necessarily highly speculative. We know from textual references that it lay northward of Ered Engrin, the Iron Mountains, and far to the east from Angband (which at this time was part of Utumno's outer defences). It therefore lay somewhere within the general region shown here, but its exact location remains in the realms of conjecture.