| Moel y Gaer | |
|---|---|
 Moel y Gaer, Llantysilio | |
| Type | hillfort |
| Location | Denbighshire, Wales |
| Coordinates | 53°00′29″N 3°14′34″W / 53.0081°N 3.2428°W |
| OS grid reference | SJ 16705 46365 |
| Elevation | 504 metres (1,654 ft) |
| Official name | Moel y Gaer, Cefn |
| Reference no. | DE126 |
| Community | Bryneglwys |
  Location in Denbighshire | |
Moel y Gaer (Welsh for "bald hill of the fortress") is an Iron Age hillfort on a summit of Llantysilio Mountain, northwest of the town of Llangollen, Denbighshire, Wales. The site is a scheduled monument classified as a prehistoric defensive hillfort.[1]
The hillfort is also protected and managed as part of the Heather and Hillforts Project. The project includes six hillforts: the four most southerly of the hillforts in the Clwydian Range (Penycloddiau, Moel Arthur, Moel y Gaer Llanbedr, and Moel Fenlli), this hillfort and Caer Drewyn.[2]