Rossendale Valley in the context of "River Irwell"

The Pennines (/ˈpɛnaɪnz/), also known as the Pennine Chain or Pennine Hills, are an upland range mainly located in Northern England. Sometimes described as the "backbone of England" because of its length and position, the range runs from Derbyshire and Staffordshire in the north of the Midlands to Northumberland in North East England. From the Tyne Gap in the north, the range extends south through the North Pennines, Yorkshire Dales, South Pennines, and Peak District to end near the valley of the River Trent. The Border Moors and Cheviot Hills, which lie beyond the Tyne Gap, are included in some definitions of the range.

The range is divided into two by the Aire Gap, a wide pass formed by the valleys of the rivers Aire and Ribble. There are several spurs off the main Pennine range east into Greater Manchester and Lancashire, comprising the Rossendale Fells, West Pennine Moors, and Bowland Fells. The Howgill Fells and Orton Fells in Cumbria are also sometimes considered to be Pennine spurs. The Pennines are an important water catchment area, with numerous reservoirs in the head streams of the river valleys.

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.

Bacup (/ˈbeɪkəp/ BAY-kəp, /ˈbeɪkʊp/) is a town in the Rossendale Borough in Lancashire, England, in the South Pennines close to Lancashire's boundaries with West Yorkshire and Greater Manchester. The town is in the Rossendale Valley and the upper Irwell Valley, 4 miles (6.4 km) east of Rawtenstall, 6 miles (9.7 km) north of Rochdale, and 7 miles (11 km) south of Burnley. At the 2011 Census, Bacup had a population of 13,323.

Bacup emerged as a settlement following the Anglo-Saxon settlement of Britain in the Early Middle Ages. For centuries, it was a small and obscure centre of domestic flannel and woollen cloth production, and many of the original weavers' cottages survive today as listed buildings. Following the Industrial Revolution, Bacup became a mill town, growing up around the now covered over bridge crossing the River Irwell and the north–south / east-west crossroad at its centre. During that time its landscape became dominated by distinctive and large rectangular woollen and cotton mills. Bacup received a charter of incorporation in 1882, giving it municipal borough status and its own elected town government, consisting of a mayor, aldermen and councillors to oversee local affairs.