Llyn Cwellyn sits between Snowdon and Mynydd Mawr, giving it a dramatic mountain backdrop. It's used for fishing, swimming, kayaking, and paddleboarding, though some areas are part of a water supply and access is restricted. There are lay-bys for parking along the A4085, with paths down to the shoreline. It's a great stop-off if you're exploring Snowdonia, with plenty of walking routes nearby.