River Rimril

The river Rimril is also known as the Serpent's Tail, because it emerges from the Snakewood. It flows then in the east of Eshpurta into the Amstel River. During the Shoon Empire it waters run red with blood of the elves from Arundath. Fishers could still find some jewelry and trinkets on their hooks.

Reference
Lands of Intrigue p. 141

Rimril