A trackway which runs parallel to, and south of, the Nant y Dernol stream linking Glan Helffin and Nant Llemysten. It is shown on late 19th and early 20th century Ordnance Survey maps and remains designated as a bridleway. It is not shown on the 1833 1" to 1 mile map. It appears to continue south southwestwards from Glan Helffin as trackway, NPRN 502691. J.J. Hall, Trysor, 27 October 2009