The Gwenllech also known as "White River" or "The River of White Stones", is in Kaedwen and flows through Kaer Morhen valley, past the keep itself, in the foothills of the Blue Mountains. Farther west it joins the Buina.
Its name means White Stones in Elder Speech.
In "The Price of Neutrality" premium module Edit
- Gwenn means "white" and lec'h means "place" in Breton. Therefore, Gwennlec'h or Lec'hwenn could be translated as "white place".
- At the very start of The Witcher 3: Wild Hunt, the game states that Kaer Morhen is on the bank of the "Gwennlech"