The Cromford Canal ran 14.5 miles (23.3 kilometres) from Cromford to the Erewash Canal in Derbyshire, England with a branch to Pinxton.
Built by William Jessop with the assistance of Benjamin Outram, its alignment included 4 tunnels and 14 locks.From Cromford it ran south following the 275-foot (84 m) contour line along the east side of the valley of the Derwent to Ambergate, where it turned eastwards along the Amber valley. It turned sharply to cross the valley, crossing the river and the Ambergate to Nottingham road, by means of an aqueduct at Bullbridge, before turning towards Ripley. From there the Butterley Tunnel took it through to the Erewash Valley. From the tunnel it continued to Ironville, the junction for the branch to Pinxton, and then descended through fourteen locks to meet the Erewash Canal at Langley Mill. The Pinxton Branch became important as a route for Nottinghamshire coal, via the Erewash, to the River Trent and Leicester and was a terminus of the Mansfield and Pinxton Railway.
A 6-mile (9.7 km) long section of the Cromford canal between Cromford and Ambergate is listed as a Biological Site of Special Scientific Interest (SSSI) and a Local Nature Reserve.In addition to purely canal traffic, there was a lively freight interchange with the Cromford and High Peak Railway, which traversed the plateau of the Peak District from Whaley Bridge in the north west, and which descended to the canal at High Peak Junction by means of an inclined plane.