Sandscale Haws is a national nature reserve on the Duddon Estuary, Cumbria, England.
The mines were taken over by Kennedy Brothers in 1893 and worked until 1905 but the pumps were kept running at Sandscale No2 to assist at Roanhead.
Shortly before BCL Barrow was closed, the present nature reserve was sold to the National Trust by Courtaulds.
A 2014-15 report by the North West Fungus Group for the National Trust emphasises the mycological significance of the reserve.
Sandscale Haws was formerly a separate Site of Special Scientific Interest, but in 1990 it was amalgamated with other SSSIs to form the Duddon Estuary SSSI.