Cynhelir digwyddiad mawr arall a gefnogir gan Lywodraeth Cymru ddydd Sul yma wrth i'r trydydd Velothon fynd rhagddo, a fydd yn gweld tua 10,000 o seiclwyr yn mynd i'r afael â'r llwybrau heriol mewn her seiclo ar ffyrdd caeedig.
Another major event supported by the Welsh Government takes place this Sunday as the third Velothon gets underway, which will see around 10,000 cyclists taking on the challenging routes in a closed road sportive.