The lake sits deep within the massive Kielder Forest, Britain's largest forest, which covers an area of over 230 square miles.
Predominantly Sitka and Norway Spruce, the forest is currently being restructured to include a wider range of species including many more broadleaf trees.
Hills, rivers and open areas add to the diversity of the forest which is one of the few places in England which is still home to native red squirrels.
Walking, cycling and horse riding are all well catered for in the forest. An interesting 13 mile Forest Toll road connects Kielder Village at the head of the resevoir to Byrness on the A68.
