The River Rhythallt is a river in Gwynedd, North Wales whose source is Llyn Padarn. It flows in a northwesterly direction past the village of Brynrefail, Gwynedd and changes its name to River Seiont downstream of Pont Rhythallt in Llanrug. The River Seiont eventually reaches the sea at Caernarfon.

Fishing Type Key
Trout (River)
Sea Trout
Trout (Stillwater)
Winter Grayling
All Species (in season)
Boat up to 2 Anglers
Bank Only