The Porter Brook is a river in the City of Sheffield, England descending over 1,000 feet (300 m) from its source among the sedge grass on Burbage moor behind a small farm on Hangram just inside the Peak District National Park in the west of the city at Clough Hollow, near the village of Ringinglow. Porter Brook derives its name from its brownish colour, similar to the colour of Porter, a brownish discolouration obtained as it passes over iron-ore deposits on its course from the source.