| Category | Valleys |
| Continent | Brucrumus |
| Region | Lands of Purity |
| Map | Hadraniel |
Khilag-Tarkin is valley coming down from the southwestern edge of the Laucentar Forest. The valley's eastern side is rugged and boulder strewn with streams and the joining of two rivers. Its western side rise to become the Marrow Fields.
Khilag-Tarkin is the primary land route for entering the Lands of Purity from the east. Most of this traffic comes by way of the Sorrow Road through Laucentar and down into Khilag-Tarkin; the Easten Gates to Purity.
During the Black Tide War a great battle was fought here. In what became known as the Battle of Breached Pass a divine blessing was laid upon the area. This divine blessing is called the Parry of Ares. It persisted after the battle and over the centuries became a holy site to Ares. Temples, shrines, and statues to Ares are scattered across Khilag-Tarkin and into the Marrow Fields.