The River Trothy is a river which flows through northern Monmouthshire.
The river rises on Campston Hill, north-east of Abergavenny. It flows southwards until Llanvapley, where it turns east. At Monmouth the river joins into the River Wye, about ⅓ mile downstream from the mouth of the River Monnow.
| ("Wikimedia Commons" has material|
about River Trothy)
- Map of confluence with the River Wye: 51°48’4"N, 2°42’13"W