Vale of Sirion
The Vale of Sirion refers to the valleys formed by the river Sirion in Beleriand. Ulmo maintained his power in the Vale around the Pass of Sirion, to protect Gondolin.
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Quenta Silmarillion: Of the Noldor in Beleriand"