| Terrig | |
| Name Etymology: | From Welsh terydd, "swift", or terig, "violent, harsh" |
| Subdivision Type1: | Country |
| Subdivision Name1: | Wales |
| Subdivision Type3: | Counties |
| Subdivision Name3: | Denbighshire, Flintshire |
| Source1 Location: | Llyn Cyfynwy, near Graianrhyd, Denbighshire |
| Source1 Coordinates: | 53.0829°N -3.1704°W |
| Source1 Elevation: | 370m (1,210feet) |
| Mouth Location: | confluence with River Alyn, Flintshire |
| Mouth Coordinates: | 53.1491°N -3.1004°W |
| Mouth Elevation: | 95m (312feet) |
The River Terrig (Welsh: Afon Terrig) is a small river in north-east Wales.
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]
Flintshire, Cambridge University Press, p.25