Landscape - Llyn Alaw

Coronavirus: advice for visiting Anglesey

View Coronavirus Advice


Llyn Alaw reservoir is Anglesey’s largest lake.  It is situated to the north west of the village of Llannerchymedd and overlies the former peatland of Cors y Bol.  It was built in the 1960s, and used to be the supply of drinking water for the northern half of Anglesey. 

The lake lies in an open landscape and has a large car park. It is fringed with vegetation, and there is woodland and scrub along parts of the lake shores.

There is marshy grassland and scrub at the northern end of the lake, with exposed mud around the lake margins at lower water levels.

The reservoir has a number of small islands, and there are paths around the lake shore, but they do not form a complete circuit. 

For a list of public toilets on the island, please see Isle of Anglesey County Council - public toilets