The Lôn Las Cymru (North) climbs steadily out of Llanidloes following the upper valley of the River Severn to the highest point on National Route 8 at 510m before dropping down to Machynlleth. There are two route options between Machynlleth and Porthmadog. A more coastal route includes the Mawddach Trail between Dolgellau and Barmouth and takes in Harlech, whilst the inland route passes through Dolgellau, Coed-y-Brenin Forest and Trawsfynydd. The routes rejoin at Penrhydeudraeth and continue to Caernarfon on the Lôn Eifion trail and then to Bangor on the Lôn Las Menai. After crossing the Menai Strait via the Menai Suspension Bridge onto Anglesey the route follows quiet roads across the island to Holyhead.
We have taken all responsible steps to ensure that these routes are safe and achievable by people with a reasonable level of fitness. However, all outdoor activities involve a degree of risk. To the extent permitted by law, Sustrans accepts no responsibility for any accidents or injury resulting from following these routes. Walking and cycling routes change over time. Weather conditions may also affect path surfaces. Please use your own judgement when using the routes based upon the weather and the ability, experience and confidence levels of those in your group.