Bottoms Reservoir is a man-made lake in Longdendale in north Derbyshire, England.

It was constructed between 1865 and 1877, by John Frederick Bateman as part of the Longdendale Chain of reservoirs to supply water from the River Etherow to the urban areas of Greater Manchester.

[2] The reservoir was obliged to release ten million gallons a day.

The drinking water flowed through the Mottram Tunnel to the Godley covered reservoir.

[3] The Peak District Boundary Walk runs along the south-western side of the reservoir and over the dam.