Realm of Ossiriand
Pass of Sirion
The Pass of Sirion was a pass between Ered Wethrin and the Echoriath in the northern Beleriandthrough which the River Sirion flowed. The pass served as a main entrance to West Beleriand from Ard-galen. It was a narrow-like valley whose sheer walls were covered with pine trees. The ground floor was very fertile.
The elves built the tower/fortress of Minas Tirith to keep the enemy out of the West Beleriand in the Age of the Stars. The pass is guarded by Orodreth of the House of Finarfin for his uncle Finrod.