A wonderful place for walking, mountain biking, fishing or to just chill and take in the magnificent views, Alwen is a 5 km long reservoir constructed in the early part of the 20th century and located just a short distance from the Llyn Brenig Visitor Centre. The reservoir supplies water to homes across north east Wales producing about 5 million gallons of water a day, but more importantly for visitors, it is a centre for outdoor leisure activities with an extensive network of cycling and walking trails.