|"Up the Rainy Stairs" by Ted Nasmith|
|Other names||Nen Girith|
|Location||River Celebros in Brethil|
|Description||Fine-spraying waterfall, crossed by a wooden bridge|
Dimrost, also known as Nen Girith, was a cascading waterfall on the stream of Celebros, where it flowed down to meet the River Taeglin on the borders of Brethil. The falls raised a fine spray into the air, from which they took their name, which means "Rainy Stair". Above Dimrost, the Men of Brethil had constructed a wooden bridge to cross the Celebros.
When Níniel was first brought to Brethil, when she saw that view from the bridge, she started shivering uncontrollably - so much so that the name of Dimrost was changed to Nen Girith, the "Shuddering Water". It was only later that the cause of her fear was discovered: the Ravines she had seen from the bridge would be the place of her tragic death.
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Children of Húrin, "Appendix 2: The Composition of the Text", [Map of Brethil]
- J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "Narn i Hîn Húrin (The Tale of the Children of Húrin)", Nienor in Brethil
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Children of Húrin, "The Death of Glaurung"
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Index of Names", entries "Dimrost", "Nen Girith"