Wet Sleddale Reservoir is an artificial reservoir set amongst the Shap Fells 4 kilometres (2 mi) south of the village of Shap in Cumbria, England, and lies just within the boundary of the Lake District National Park.

The triangular shaped reservoir, which can store 2,300 million litres of water, was created by the construction of a dam across Sleddale Beck in order to supply Manchester with water.

[4] The extracted water is carried to Haweswater, mainly through tunnels.

[5] The beck emerges from the foot of the dam as the River Lowther.

[7] Alfred Wainwright describes a walk from here in the Wet Sleddale Horseshoe chapter of his The Outlying Fells of Lakeland.