Fredrick 'Ted Nasmith, 76, was last seen in the bush area near Toad Lake in Lake of Bays Township on Wednesday. (Supplied)

The Ontario Provincial Police in Huntsville are asking for the public's help in locating a man who went missing Wednesday.

Fredrick 'Ted' Nasmith, 76, was last seen in the bush area near Toad Lake in Lake of Bays Township.

"Ted was out for a hike with his wife, Cecilia, on Monday," police said in a news release on Thursday. "The two became separated. Cecilia was able to make her way to Limberlost Road today at approximately 10:05 a.m. and with the aid of a civilian was able to contact emergency services personnel. Cecilia is in good health and is at home."

Police are now searching for her husband. He is described as 5-foot-8, 160 pounds with a grey mustache and beard. He was wearing an orange ball cap, long sleeve light blue sweater, green pants, and brown hiking boots.

Residents in the area of Toad Lake are being asked to check their properties and outbuildings.

"Police and the family are concerned for Ted's well-being," police said.

Anyone with information is asked to contact the Huntsville OPP at 705-789-5551 or 1-888-310-1112.