Halfaya Pass (, known colloquially as Hellfire Pass) is located in Egypt, near the border with Libya. A high escarpment extends south eastwards from the Egyptian-Libyan border at the coast at as-Salum (or Saloum, Solum, Sollum), with the scarp slope facing into Egypt. Halfaya Pass is about two miles inland from the Mediterranean and provides a natural route through. The escarpment is known as () "great ascent". To El-Edrisi it was known as () "graded ascent", whence the modern name of the gulf and the town of Salum.