| Castell y Gwynt | |
| Elevation M: | 972 |
| Prominence M: | 16 |
| Parent Peak: | Glyder Fach |
| Listing: | Nuttall |
| Translation: | castle of the wind |
| Language: | Welsh |
| Location: | Snowdonia, Wales |
| Range: | Glyderau |
| Grid Ref Uk: | SH656583 |
| Topo: | OS Landranger 115 |
Castell y Gwynt is a top of Glyder Fach in Snowdonia, north-west Wales. It has the merit of being the only 3000 ft Welsh summit classed as only a Nuttall, hence it is not included in the Welsh 3000s. It has a prominence of 15.7 m (51.5 ft), and was only included on the Nuttall's list after re-surveying in 2007. The top is more famous as a feature than a summit.
"Castell y Gwynt" and the "Cantilever Stone" featured in Walt Disney's Dragonslayer.[1]