Morgul Vale was a valley in the Ephel Dúath through which the Morgulduin ran. The valley was guarded by Minas Morgul (or Minas Ithil in years past).
It was through the vale that an army of Orcs marched from the fortress, led by the Witch-king of Angmar, marching towards Gondor to besiege Minas Tirith in the year TA 3019. Frodo Baggins, Samwise Gamgee, and Gollum observed the procession from hiding, on their way to the Stairs of Cirith Ungol.
- ↑ 1.0 1.1 The Lord of the Rings, The Two Towers, Book Four, Ch. VIII: "The Stairs of Cirith Ungol"