Llynnau Mymbyr

Llynnau Mymbyr are two lakes located in Dyffryn Mymbyr, a valley running from the village of Capel Curig to Pen-y-Gwryd.
Strictly speaking this is one lake, originally called Llyn Mymbyr, with a maximum depth of 30 feet. About 3/4 mile long in total, a delta has built up midway along the north shore, and this has to all purposes cut the lake in two - hence the plural name.

The river feeding the lakes is the Nantygwryd (or Nant-y-gwryd), also marked on maps as the Nant Gwryd, which is a tributary of the Afon Llugwy. These two join at Capel Curig.