Carach Angren

Narrow defile between mountain spurs with a wall, trench, and single bridge. Also called the Isenmouthe, it guards passage from Gorgoroth to the interior of Mordor.

Carach Angren, also known as the Isenmouthe, stands as a formidable natural and fortified defile in Mordor, channeling invaders through a narrow pass flanked by mountain spurs, a deep trench, a sheer wall, and a lone bridge that serves as its choke point. Featured prominently in The Return of the King, it represents Sauron's strategic bulwark guarding the vulnerable route from the hellish plains of Gorgoroth into Mordor's heartland. Though static in its defensive role, it underscores the perilous geography that Frodo and Sam must navigate in their desperate quest, highlighting how Mordor's defenses funnel and trap any who dare approach.