Wasdale Valley is the wildest valley on the west side of the Lake District National Park, in Cumbria, England. It is crossed by the River Irt, which flows to its estuary at Ravenglass. A big part of the valley is occupied by the deepest lake in England, named Wastwater, which is 78 m (258 feet) deep. At the Wasdale Head end of the lake a campsite and Wasdale Hall Youth Hostel are found, both owned by the National Trust. The campsite nestles under the Scafell Mountain Range and is a paradise for those who seek adventure.