Cairn Umber was a fortress built for the purpose of being a trade centre. It was located in a region where a valuable food grain called gildenfleur grew naturally. 'Cairn Umber' literally means memorial of shadows.
Cairn Umber was built by the Gwar during the Age of Chains, enslaved by the Elven race. The stone was quarried eighteen leagues, or fifty-four miles, away, and was transported by the Gwar that distance to the location of Cairn Umber. From that journey, it gained the name Fellmarch, after the long, bitter journey the Gwar were forced to take.