National Cycle Route 70

National Cycle Network Route 70 is a Sustrans National Route that runs from Walney Island in Cumbria to Sunderland. The route is fully open and signed. From end to end the route is 149 miles , but two sections are shared with other NCN routes leaving Route 70 at 128 miles .
Route 70 is the original route of the W2W challenge route which was launched on 1 June 2005. When launched the route used sections of NCN Routes 72, 68 and 71 west of the Pennines. From Tan Hill to Sunderland a new Regional Route was created and given the number 20, with a blue background. In 2012, after improvements to meet National Cycle Network standards, it was upgrade to Route 70. Route signs were changed to the number 70 with a red background. Around the same time the sections on the route that had previously been Route 71 and 72 were re-signed as Route 70.

Wikipedia