Located east of Mount Snowdon, this dense forest covers 7,250 hectares. It encircles the village of Betws-y-Coed entirely and reaches the village of Trefriw in the north.
The forest takes its name from the ancient estate of the Wynn family of Gwydir Castle.
The forest offers panoramic views of the Glyderau, Carneddau and Snowdon mountain ranges. The Llugwy, Lledr and Machno rivers cross the forest.
Gwydyr is also home to many scenic lakes such as Llyn Crafnant on the northern edge, Llyn Geirionydd or Llyn Elsi.
The area has been appointed a Site of Special Scientific Interest.