River Terrig

The River Terrig (Welsh: Afon Terrig) is a small river in north-east Wales.

Terrig
The Terrig near Leeswood Old Hall.
Etymology	From Welsh terydd, "swift", or terig, "violent, harsh"
Native name	Afon Terrig (Welsh)
Location
Country	Wales
Counties	Denbighshire, Flintshire
Physical characteristics
Source
• location	Llyn Cyfynwy, near Graianrhyd, Denbighshire
• coordinates	53°4′58.28″N 3°10′13.49″W
• elevation	370 m (1,210 ft)
Mouth
• location	confluence with River Alyn, Flintshire
• coordinates	53°8′56.929″N 3°6′1.595″W
• elevation	95 m (312 ft)

The river rises at Llyn Cyfynwy near Graianrhyd village in the community of Llanarmon-yn-Ial, Denbighshire, about three miles from the source of the River Alyn.[1] It then flows northwards and eastwards, forming the boundary between the old parishes of Nercwys and Treuddyn. At Nant-y-Mynydd it is joined by several small springs from Mynydd Ddu, and finally itself joins the River Alyn at Pontblyddyn, Flintshire.[1]

The Terrig is a habitat for brown trout. Its name is derived from its rapid flow after times of heavy rain; Thomas Pennant, in his Tours in Wales, described it as "the Terrig, or the violent, [...] often of a tremendous swell and fury".[2]