The Ashby Canal is 22 miles (35.4 km) long with no locks and runs from the Coventry Canal at Marston Junction to Snarestone. It was originally 30 miles long to a terminus at Moira but the northern 8 miles were progressively closed due to coal mining subsidence. It was planned as a broad canal and has wider bridges built to take barges but is nowadays used only by narrow boats, and some of the bridge holes have been narrowed. In recent years an isolated section of 1½ miles has been restored at Moira which can be accessed by trail-boats. This section includes a new lock built to wide beam dimensions.
The maximum size of boat that can navigate the Ashby Canal is
length: There are no locks to limit length
beam: 8' 2" (2.49 metres) - Safety Gate near Marston Junction
height: 8' 8" (2.64 metres) - Bridge 15a
draught: 4' 7" (1.39 metres)