The Peak District is an upland area in England at the southern end of the Pennines. It is mostly in northern Derbyshire but also includes parts of Cheshire, Greater Manchester, Staffordshire and Yorkshire.
The area has two main parts. The northern 'Dark Peak' is where most of the moorland is found. Its geology is gritstone. The southern 'White Peak' is where most of the population lives: its geology is mainly limestone.