The River Taf is about from Crymych to Ginst Point, of which about is tidal. Water drains from high ground above the village of
Crymych in Pembrokeshire, and at one time flowed at ground level across the main
Cardigan–
Tenby road (
A478) before falling to the level of the
Whitland and Cardigan Railway station
Crymmych Arms (
Great Western Railway) where on the UK
Ordnance Survey map of 1866 it is shown as the source of the Taf. The stream fulfills its description "Crymych" (in
Welsh "crooked stream") by turning through almost a right angle along the floor of the valley. The stream is mentioned—with various spellings—in records since 1468 and provided both the village and its hostelry with an identity. Modern maps show the source to be altitude at the foot of Frenni Fawr, close to the defunct railway. From Crymych the Taf, augmented by numerous minor tributaries, flows ESE to
Llanfyrnach; SW through
Glandwr, Llanglydwen,
Login and Llanfallteg after which it becomes the county boundary between Pembrokeshire and Carmarthenshire, passing several times beneath railway lines. It is joined by the right bank tributary
Afon Marlais, and turns east into Carmarthenshire, then runs beneath the
A40 road to
Whitland; east to
St Clears, south to its broad estuary. ==References==