Llyn Sarnau (North Wales) Gwydyr Forest

Cj Roberts posted a photo:

Llyn Sarnau a small lake within the Gwydyr Forest near Llanrwst North Wales. Gwydir Forest, also spelled Gwydyr, is located in Conwy county borough and the Snowdonia National Park in North Wales. It takes its name from the ancient Gwydir Estate, established by the John Wynn family of Gwydir Castle, which owned this area.
The Forestry Commission uses the alternative spelling (i.e. Gwydyr Forest, Coedwig Gwydyr).The forest broadly encircles the village of Betws-y-Coed, and much of its mid-section lies within the parish. It reaches northwards to the village of Trefriw, and southwards to the village of Penmachno. It covers an area of over 72.5 square kilometres, including 49 square kilometres of productive woodland.
Certainly there would have been a certain amount of natural tree growth on these hills thousands of years ago. More recently, records from the 18th century refer to the rafting of timber down the river Conwy. In the 19th century use was made of the quay at Trefriw for the shipment of timber to the coast. In 1778, referring to Carreg-y-Gwalch, just above Gwydir Uchaf, Thomas Pennant was told that "the noblest oaks in all Wales grew on this rock within living memory."
The forest occupies an undulating plateau, reaching to between 700 and 1,000 feet (300 m) above sea level, which is divided by the valleys of the rivers Llugwy, Lledr, and Machno, all of which are tributaries of the river Conwy. Despite being a forest, much of it is not dark and enclosed, and it offers fine views over these valleys, with further views to the mountains of the Glyderau, the Carneddau and the Snowdon massif itself.
The forested areas occupy the stee! p slopes and poorer soils of the plateau, the best of the soil being in the agricultural valley bottoms. Rainfall in the forest varies from under 50 inches (1270 mm) to over 80 inches (2032 mm) p.a.
The forest is home to numerous lakes, all of which are reachable by footpaths, and nearly all of which were created to serve the mines of the Forest. In order of size, these include:


Llyn Parc, with the water at a lower level than normal
Llyn Crafnant 63 acres (250,000 m2) - on the northern edge of the forest
Llyn Geirionydd 45 acres (180,000 m2)
Llyn Elsi 26 acres (110,000 m2)
Llyn Parc 22 acres (89,000 m2)
Llyn Glangors 15 acres (61,000 m2)
Llyn Bodgynydd 14 acres (57,000 m2)
Llyn Goddionduon 10 acres (40,000 m2)
Llyn Pencraig 5 acres (20,000 m2)
Llyn Bychan 3 acres (12,000 m2)
Llyn Sarnau 3 acres (12,000 m2)
Llyn Tynymynydd 1-acre (4,000 m2)