Llyn Trawsfynydd is a large reservoir stretching approximately 5 miles in length, set within the stunning landscape of Snowdonia National Park in North Wales. Fed by the Afon Prysor and its surrounding upland catchment, this substantial body of water sits at elevation amid the wild Welsh hills, offering anglers a scenic and productive fishery. With an average depth of around 12 feet, the lake is characterized by a relatively shallow profile punctuated by submerged rocky outcrops throughout — features that both challenge navigation and concentrate fish. The reservoir has earned a strong reputation for top-of-the-water sport and hard-fighting fish, drawing anglers from across the UK for its quality rainbow and brown trout fishing alongside a healthy population of coarse species.