The World's Edge Mountains (also spelled in many sources as the Worlds Edge Mountains) are the greatest range of mountains in the world, stretching out from the northern portion of the Old World and extending into the Southlands. Thus, they form a natural barrier between the Old World and the Dark Lands. In the distant past, the World's Edge Mountains were at the heart of the great Dwarven Empire of ancient days, and even now, many great Dwarven holds and fortresses may be found amidst this towering range of peaks.
The World's Edge Mountains are considered the largest mountain range in the whole world. The mountains reach from the most northern parts of the Empire and Kislev, to as far south as the jungles of the Southlands. The whole mountain range is said to be the main barrier for any race to cross if they are to invade the lands of the west, such as the Old World and Araby. It is also the strongest barrier for the Greenskin race of the Dark Lands and beyond from invading the lands of the Empire, but much of it is due to the stout and valiant defence of the Dwarfs of Karaz Ankor. It is said that the Dwarven empire reached the entirety of the whole mountain range, from the most southern hold of Karak Zorn, to the lost northern hold of Karak Dum. The first Dwarven settlement started in the South where Karak Zorn is said to be the first, then they followed the veins of minerals all the way to the mountains bordering the current Empire.
The mountains are also said to split into several smaller ranges that branch out of the mountain range, to that of the Black Mountains, that act as the Empire's southern borders to the Border Princes, and the Grey Mountains that act as the western border that separates the lands of Bretonnia and the Empire. The range continues on more north until it splits in the lands of Norsca, and the other connecting to the Mountains of Mourn.
- Warhammer Armies: Dwarfs (7th Edition) pg. 22 - 23