Martindale Valley lies within the Lake District National Park, in Cumbria, England. It stands between the lakes of Ullswater and Haweswater and is served by a narrow road. The foot of the valley is situated at the small village of Sandwick. The upper side, around The Nab, is a deer reserve which is not open to the public, so hikers are requested to maintain the preferred paths which avoid the herds when climbing The Nab. One of the most popular walks is the Martindale Skyline, which takes in many of the peaks around the valley, such as Beda Fell and Steel Knotts. The principal area of habitation is located in the lower part of the valley.