Also known as the Sea to Sea cycle route, the coast to coast cycle route from the Irish Sea to the North Sea, is challenging with some long uphill climbs and steep gradients particularly in the Pennines.
At approx. 140 miles long it's normally travelled from West to East due to the topography and prevailing wind.
Two days is possible whilst three days is achievable.
Four days allows the most difficult region - the Pennines, to be cycled over two days.
It has been completed in a record 7 hours 53 minutes and 03 seconds.
Such times however are reserved for the super fit.