Sprotbrough Flash is a nature reserve south of Sprotbrough near Doncaster, South Yorkshire, on the north bank of the River Don. It is named after its main feature, a long, water-filled depression parallel to the river. The reserve is managed by the Yorkshire Wildlife Trust. It overlaps with Sprotbrough Gorge, a Site of Special Scientific Interest. The size of the protected area is 28 hectares (0.28 square kilometers). The Trans Pennine Trail passes through the area.