The Black Gate
Names: Morannon (Sindarin: “black gate”).
Location in Peter Jackson films: Tukino Skifield, Mount Ruapehu.
Description: An urban trough of Mordor. The place where traffic comes in and out as Sauron’s troops enforce Mordor’s stringent border security. This is the region where the mountain ranges of the Ephel Dúath and Ered Luithi meet. Mordor’s great intersection.
After treading across the Plateau of Gorgoroth and exploring its salient landmarks, we’ve reached a stage of our odyssey where we encounter a mix of landmarks and intersections. The northwest of Mordor incorporates a commerce region, or at least places where Tolkien’s idea of commerce takes place. Less defined by a single landmark than a mass of historical events, our approach to Mount Doom and Barad-dûr was functionally to write tour brochures on raggedy parchments that orcs might hand to visitors from Rohan or Erebor before their scheduled Hour of Torture with Sauron the Great. (They’d probably be confused by the bits about authorship and this fellow named Tolkien though). In this part of Mordor, we’re faced with a mass of places where seminal events happened long ago. The Black Gate is the crucial landmark of far northwestern Mordor, but to unlock it, we have to uncover the history of the lands around it first.

In its northwestern quarter, Mordor shares a border with Northern Ithilien, a fiefdom of its rival Gondor. As bordering neighbors at war, Gondor and Mordor wrestle for control over places on their borders — in The Two Towers, when Sam and Frodo arrive in the northwest, they meet Gondor’s Captain Faramir as he leads a campaign to expel the Haradrim, Mordor’s allies, from Ithilien. In The Return of the King, Gondor tries and fails to hold the abandoned city/military outpost Osgiliath, losing it to Mordor’s orcs. The region is one of the most tumultuous in Middle-earth, as the two most powerful forces on the continent vie to colonize it. Imagine the United States and Canada waging a war over Alaska, and you’ll get the picture.
Beyond the Isenmouthe (or Carach Angren) pass, our perambulation to the Black Gate starts in Udûn, a valley whose name literally means hell. It serves as an elbow to the arm of mountain ranges that encircles Mordor, Ered Lithui and Ephel Dúath. Tolkien wrote virtually nothing about Udûn, probably figuring that naming a place “Hell” was enough to mark it as notable. The only other information we have about Udûn is that it’s guarded by Durthang, a once Gondorian fortress appropriated by Mordor after Gondor abandoned its watch of the Black Land. It has little plot relevance to The Lord of the Rings unless you care about the brief divergence in The Return of the King where orcs Frodo and Sam fall in with before the destruction of the One Ring marched from Durthang, but it differs from Barad-dûr in a key respect.…