Ontario Highway 6 is a provincial highway in Ontario, Canada. It is 472.4 kilometers (293.5 miles) long. It starts in the community of Port Dover and ends at the Trans-Canada Highway (Ontario Highway 17) in Baldwin, Ontario. The highway is divided into two parts. A ferry runs between one end in Tobermory, on the northern tip of the Bruce Peninsula, and the other in Tehkummah, on Manitoulin Island.