It reaches as far as the edge of the built-up area around the town of St Blazey and the port of Par, a distance of some 3 miles (5 km).
It lies within the civil parishes of Luxulyan, Lanlivery and Tywardreath, and is one of the areas (designated A8i in the original nomination) of the larger, but discontinuous, Cornwall and West Devon Mining Landscape World Heritage Site.
This second route served two major purposes, as it enabled Treffry to develop Carbeans and Colcerrow granite quarries in the upper valley, and was also used by a leat carrying water to supply the mine at Fowey Consols.
The newer route is still in use, as part of the Atlantic Coast Line, and passes beneath the spans of the Treffry Viaduct that carried its predecessor.
The woods were important for making the charcoal that was needed in large quantities for smelting tin from the rich alluvial deposits on the moors to the northwest.