Traeth Mawr Loop was a short-lived terminus during the restoration of the Welsh Highland Railway (WHR).
Track laying to Traeth Mawr was completed by the Welsh Highland Railway by November 2006, making it the northern limit of the WHR from Porthmadog.
Although WHR ran push-pull services to a point just south of Farmyard Farm Crossing, for some time afterwards.
After closure, the Traeth Mawr loop was removed in order to construct the WHR's new main line building southwards.
Regular passenger trains on the completed line through the former site of the Traeth Mawr Loop re-commenced from Porthmadog Harbour on 4 January 2011.