The Rhimdath (Sindarin for Rushdown) is a river in Rhovanion. It is a short, early tributary of the Anduin. It flows from the Misty Mountains eastward into the Anduin shortly after the Langwell-Greylin confluence in a steep gradient.
The northern branch of the Rhimdath falls down from the Misty Mountains north of Lyndelby.
The branch of the river then pools up into a lake nestled between the mountains and the fields of the holbytlan.
The hidden road to Lyndelby crosses the north branch in a bridge, where the Great Eagle Fanglind perches.
The southern branch of the Rhimdath also originates from the Misty Mountains, but south of Lyndelby.
At the bottom of the falls, the Rhimdath joins the flow of the newly-formed Anduin, making it count as one of the Wells of Langflood together with the Langwell, Wyrmsgráf and Greylin rivers.