Kenidjack Valley (Cornish: Keunyjek, meaning place abounding in firewood),sometimes referred to as Nancherrow Valley (Cornish: Nanj Erow, meaning acre valley), is a steep-sided valley in Cornwall, United Kingdom.
The Tregeseal River flows down the valley and discharges into the Atlantic a few hundred metres north of Cape Cornwall 50°07′48″N 5°42′11″W / 50.130°N 5.703°WCoordinates: 50°07′48″N 5°42′11″W / 50.130°N 5.703°W, half-a-mile north-east of the village of St Just.
The valley was an important area of tin mining and the remains of Wheal Owles, Wheal Castle, Boswedden Mine and the Kenidjack arsenic works are still visible. Today the valley is popular for hiking and birdwatching.