Grey County OPP say a man found lying on the road on Graham's Hill in the Municipality of Grey Highlands had no vital signs.
On Sunday at around 3:52pm, the man was transported to the hospital by ambulance where he was pronounced deceased.
A post-mortem examination was conducted on Monday in Owen Sound. His death is not deemed suspicious.
The 68-year old man from Toronto was visiting family in the area when he suffered a fatal medical condition while out for a walk.
His identity is not being released.