Killington Lake is actually a reservoir, which was formed when Killington Beck was dammed in 1819, to supply the Lancaster Canal. Killington Beck rises on Lamrigg Fell at a height of around 300 metres. The fell lies between Kendal and Sedbergh.
The Lake is highly popular with water sport enthusiasts and offers opportunities for dinghy sailing, windsurfing and canoeing.
Burns Beck Moss Nature Reserve, on the west side of the lake makes it an ideal location for birdwatchers. The reserve, owned by the Wildlife Trust, covers 47 acres and occupies the site of an infilled tarn dating from the Ice Age. It has been designated a Site of Special Scientific Interest. Fox, hare, roe deer, tawny owl, snipe, reed bunting and heron are frequently sighted at the reserve. As are curlew, sedge warbler, willow warbler, grasshopper warbler and meadow pipit.