Roger Fletcher was last seen setting off from a holiday home in Bundalloch, near Dornie, at 8.30am on Sunday morning for a walk.
A Police Scotland spokeswoman said: “He walks with a stoop and uses two walking poles to assist him.
“He has white coloured hair and wears glasses. It understood he may have a small khaki coloured rucksack with him.
“It is believed that Roger was walking around the Bundalloch and Camuslighne area but did not arrive at his collection point.