| Garn Boduan | |
| Elevation M: | 279 |
| Prominence M: | 172 |
| Location: | Llŷn Peninsula, Wales |
| Range: | Snowdonia and Llyn Peninsula |
| Listing: | Marilyn |
| Garn Boduan | |
| Location: | Gwynedd, Wales, UK |
| Pushpin Map: | Wales Gwynedd |
| Pushpin Map Caption: | Location in Wales Gwynedd |
Garn Boduan is an Iron Age hillfort and hill near Nefyn, on the Llŷn Peninsula in Wales.
In a survey in the 1950s the traces of over 170 round houses were identified on this site, and around 100 round houses are still visible on the ground.[1] Between 100 and 400 people may have lived in this fort.[2] The lower stone rampart is the original defence built in the Iron Age.[3] At a later date, perhaps in the 6th/7th century AD, a smaller rampart was built on the eastern side.[3]