Lon Las Cymru
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Lon Las Cymru (Welsh : Wales' Green Lane) is the Welsh National Cycle Route which runs largely north-south from Holyhead to Cardiff and Chepstow. In total it measures some 400km in length.
Some of its route follows the trackbed of former railway lines, such as Lon Menai, Lon Eifion, the Mawddach Trail and the Taff Trail.