The South Pennines is a region of moorland and hill country in northern England lying towards the southern end of the Pennines. In the west it includes the Rossendale Valley and the West Pennine Moors. It is bounded by the Greater Manchester conurbation in the west and the Bowland Fells and Yorkshire Dales to the north. To the east it is fringed by the towns of West Yorkshire whilst to the south it is bounded by the Peak District. The rural South Pennine Moors constitutes both a Site of Special Scientific Interest and Special Area of Conservation.

The Rossendale Valley is in the Rossendale area of Lancashire, England, between the West Pennine Moors and the main range of the Pennines. The area includes the steep-sided valleys of the River Irwell and its tributaries, which flow southwards into Greater Manchester. The rivers cut through the moorland of the Rossendale Hills, generally characterized by open unwooded land, despite the ancient designation of "forest".