 At the Llanwnda station the Lon Eifion continues south over Glanrhyd to the A487/A499 Pwheli/Porthmadog roundabout, which prior to the Penygroes bypass, was the site of the old Llanwnda Rail Station on the Carnarvonshire Railway.Crossing the roundabout you join the Llanwnda - Groeslon section of the route Lon Eifion, passing on your right the railway cottages built to serve the railway station.The route continues alongside the A487 before passing underneath the road bridge at Afon Llifon before continuing to the village of Groeslon.