Thirlmere

Thirlmere is a reservoir lying in the valley between Keswick and Grasmere, under the western slopes of Helvellyn. In the 1890s Manchester Corporation raised the level of two smaller lakes with a dam at the northern end to supply water to the city, flooding the hamlets between them, and it still supplies the north west today.

The lake is about 6 kilometres long and its shores are heavily planted with conifers, though much has been thinned and replaced with broadleaves in recent years. The A591 runs along the eastern side, and a quiet minor road follows the western shore, with car parks and lakeside paths. It is a good place for a gentle walk or picnic when the more famous lakes are busy.

Above the western shore, Raven Crag gives a superb view down the lake and is a short, steep walk from the road. Helvellyn is climbed from the eastern side at Swirls and Wythburn, routes which are shorter but steeper and less dramatic than those from Glenridding. At the northern end, the walk round St John's in the Vale makes a lovely low level circuit. It is lovely in autumn, when the broadleaved woods turn, and on still mornings when the lake reflects the fells.

Thirlmere's shore can feel enclosed by forest, and the main road is busy. Swimming and boating are discouraged on the reservoir. Choose the western shore road for the best of it.