Solo. From Causewayhead to Sheriff Muir road at NS819995. Walked SE on a track close to a wood, which was on the left-hand side of the track. Shortly after passing a reservoir left the track and followed an indistinct path southwards. Higher up I joined a track that looked as though it had been used by quad bikes. I followed this until it joined the main path leading to the summit of Dumyat, which was followed to summit. Took in a minor top on the way back.