runs from Aberystwyth to Wolverhampton, with a section running through Wales called Lôn Cambria
. Part of the route 81 passes along the Montgomery Canal
The Canal path starts on the banks of the River Severn
at the centre of Newtown and follow the riverside path as it heads towards Llanllwchaiarn.
After leaving Llanllwchaiarn the path passes through Pwll Penarth Nature Reserve
and then turns into a towpath as you pick up the water filled sections of the Montgomery Canal.
It is possible to travel the route in one direction and return to the starting point by using the Cambrian Rail Line
between Newtown and Welshpool.