| Mynydd y Betws | |
|---|---|
| Elevation | 374 m (1,227 ft) |
| Prominence | 205 m (673 ft) |
| Listing | Marilyn, council top |
| Location | |
| Location | Swansea / Carmarthenshire, Wales |
| OS grid | SN664094 |
Mynydd y Betws is a mountain located on the border between Swansea and Carmarthenshire, south Wales.
It is the highest mountain in Swansea, and the highest land between the River Loughor and the Upper Clydach River. A small road between Ammanford and Clydach passes very close to the summit, on which are located the historic ruins of Penlle'r Castell.