Originally two smaller lakes, the Manchester City Corporation Waterworks purchased the lakes in 1889 and dammed the area, creating Thirlmere reservoir. The damming of the reservoir resulted in the submergence of two villages; Armboth and Wythburn.
The reservoir supplies water to Manchester with a low level circular route to walk around. There are more challenging routes in the surrounding fells with the Helvellyn Ridge to the east, providing stunning scenery.
Thirlmere reservoir offers a peaceful escape and is a great place to spot red squirrels, being a designated red squirrel reserve.