North Pennine Ring

The North Pennine Ring is a canal ring which crosses the Pennines between Manchester, Leeds and Castleford. It follows parts of five canals, and shares much of its route with the Outer Pennine Ring, which uses a different route for the southern crossing of the Pennines.
The concept of a canal ring was created in 1965, as part of a campaign by the Inland Waterways Association to prevent the complete closure of the Rochdale Canal. Initially the canal was described as part of the "Cheshire Canal Ring", which was soon shortened to the "Cheshire Ring". It described a series of interconnecting canals which could be navigated, usually in a week or two, without having to cover any section twice, and has subsequently been applied to several other such routes. The North Pennine Ring is a recent addition, as it was only with the restoration of the Rochdale Canal in 2002 that the ring became a possibility.

Wikipedia