Ponden Reservoir is an artificial upland lake in the Worth Valley, near Stanbury, West Yorkshire, England.

[4] But the construction was beset by problems with the puddle trench (needed for the dam wall), being sunk to a depth of 67 feet (20 m) before finding rock.

One of the major tributaries is Ponden Clough, which flows over sandstone beds, typically composed of grit, mudstone and Keighley Bluestone (a hard wearing stone used in road building locally).

[13] A catchment tower was built at the head of Ponden Clough which takes water away from the stream and straight into Watersheddles by the means of a conduit.

[14] The water quality of Ponden is rated as moderate for ecological purposes, and good for its chemical composition, by the Environment Agency.