The River Westend flows through the Dark Peak

Dark Peak

The Dark Peak is the higher, wilder northern part of the Peak District in England.It gets its name because , the underlying limestone is covered by a cap of Millstone Grit which means that in winter the soil is almost always saturated with water...

 of the Derbyshire

Derbyshire

Derbyshire is a county in the East Midlands of England. A substantial portion of the Peak District National Park lies within Derbyshire. The northern part of Derbyshire overlaps with the Pennines, a famous chain of hills and mountains. The county contains within its boundary of approx...

 Peak District

Peak District

The Peak District is an upland area in central and northern England, lying mainly in northern Derbyshire, but also covering parts of Cheshire, Greater Manchester, Staffordshire, and South and West Yorkshire....

 in England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

. Its source is at Bleaklow Stones on Bleaklow

Bleaklow

Bleaklow is a high, largely peat covered, gritstone moorland, just north of Kinder Scout, across the Snake Pass , in the Derbyshire High Peak near the town of Glossop...

, from where it flows south east into a western arm of the Howden Reservoir

Howden Reservoir

The Howden Reservoir is a Y-shaped reservoir, top one of the three in the Upper Derwent Valley, England. The western half of the reservoir lies in Derbyshire, whereas the eastern half is in Sheffield, South Yorkshire. The county border runs through the middle of the reservoir, following the...

. Its lower reaches run through a forestry plantation.

Tributaries of the river include the Ravens Clough, the Black Clough, the Fagney Clough, the Green Clough and the Grinah Grain.