Yehimal Mountains

The Yehimal, a name meaning "Rock-Snow", or the Mountains of Snow, and sometimes called the Yehimal Mountains, was an immense mountain range that formed the primary barrier between the three continents of Zakhara, Faerûn, and Kara-Tur, and between them the Hordelands. They were famed as the largest, highest, most extensive, and indeed greatest mountain range in all the known lands of Toril.

Geography
The Yehimal was undoubtedly the most majestic natural wonder in all the Hordelands, thanks to its soaring, glacier-topped peaks. These ranged in height from 15,000 feet (4570 meters) to astonishing 30,000 feet (9140 meters) above sea level, marking them as the tallest in the world. The mountains were formed from folded and upthrust granite, with jagged profiles.

The mountains sprawled southwest of Shou Lung in Kara-Tur and lay south and east of the Jumpa River Gorge, which delineated the mountains from the steppes of the Hordelands. The Yehimal effectively dominated and separated the steppes from the southern kingdoms.

Geographical Features
The Yehimal comprised multiple lesser mountain ranges and branches:
 * The World Pillar Mountains or Jibal al-Akbas in Zakhara
 * The Wu Pi Te Shao Mountains in Kara-Tur

History
According to dwarven legends, the Yehimal was the site of the very first dwarf settlements on Toril, founded some tens of millennia before the 14th century DR, that is, around −16,000 DR. Scholars estimated that they later made a great exodus out of the Yehimal, migrating into the continents of Faerûn, Kara-Tur, and Zakhara and dividing into two or three major branches. The ones who ventured north into Faerûn are theorized to have made their first settlements under the lands that would be known as Semphar, before spreading westward. By −15,000 DR, they'd already founded their first great kingdom, Bhaerynden, beneath the Shaar.