The West Pennine Moors is an area of the Pennines covering approximately 90 square miles (230 km2) of moorland and reservoirs in Lancashire and Greater Manchester, England. It is a Site of Special Scientific Interest.The West Pennine Moors are separated from the main Pennine range by the Irwell Valley to the east. The moorland includes Withnell, Anglezarke and Rivington Moors in the extreme west, Darwen and Turton Moors, Oswaldtwistle Moors and Holcombe Moors. These moors are lower in height than the main spine of the South Pennines. At 1,496 feet (456 m), the highest point is at Winter Hill. The area is of historical importance with archaeological evidence of human activity from Neolithic times. The area is close to urban areas, the dramatic backdrop to Bolton, Blackburn and Bury and neighbouring towns affording panoramic views across the Lancashire Plain and the Greater Manchester conurbation. The moorland is surrounded by the towns of Bolton, Chorley, Darwen, Horwich, Ramsbottom, Haslingden and Oswaldtwistle. Notable structures include Rivington Pike Tower, Winter Hill transmitting station, Peel Monument near Holcombe and the Jubilee Tower on Darwen Moor.
United Utilities owns around 40% of the land for water catchment. The company operates four information centres at Rivington, Jumbles Country Park, Roddlesworth and Haslingden Grane.