Llyn Brenig is a large reservoir on the Denbigh Moors and is popular for fishing, sailing, paddleboarding, and cycling. There's a visitor centre with facilities, parking, and a café, making it easy to spend a whole day here. A circular track runs around the reservoir for walking or mountain biking, and there are plenty of quiet bays for launching. With its mix of open water and woodland trails, it's a versatile outdoor destination.