Start next to red Royal Mail box in lay-by approx 1 mile west of Llandovery on the A40. Proceed westwards along A40 via Llanwrda by-pass, Manordeilo and Rhosmaen to Llandeilo roundabout (10.338 miles). Take 2nd exit (A40), continue through Halfway, Pontarcothi, and Nantgaredig to roundabout to East of Abergwili (23.095 miles). Take 2nd exit (A40), proceed along Abergwili by pass to next roundabout where take 1st exit along Camarthen eastern by-pass to roundabout at junction with B4300 (25.081 miles). Turn and retrace the outward route along the A40 to roundabout West of Abergwili, take 2nd exit along Abergwili by pass to roundabout (27.112 miles). Take 2nd exit again along the A40 via Nantgaredig, Pontarcothi and Halfway to Llandeilo roundabout (39.866 miles). Take 1st exit again along A40 via Rhosmaen, Manordeilo and Llanwrda by pass to finish at telegraph pole referenced TP12 in lay-by opposite and 12 metres east of starting point (50.025 miles). MAP HAND DRWAN AND INACCURATE BUT GOOD ENOUGH