King's Highway 121, commonly referred to as Highway 121, was a provincially maintained highway in the Canadian

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 province of Ontario

Ontario

Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

that was transferred to the counties in which it lay on January 1, 1998 and in 2003. The following roads currently follow the same alignment as Highway 121 did: in Kawartha Lakes south of Minden in Haliburton County between Minden and Haliburton village between Haliburton village and Paudash