Teggie is the name given to a lake monster reported to live in Bala Lake (Llyn Tegid) in Gwynedd, north Wales, United Kingdom. Sightings began around 1920.
Bala Lake is 6.4 km long by 1.6 km wide, and is subject to sudden and dangerous floods. The River Dee runs through it and the waters of the lake are famously deep and clear. The town of Bala sits at its northern end.