Bluewater Highway | |||||||
Highway 21 highlighted in red | |||||||
Route information | |||||||
Maintained by the Ministry of Transportation of Ontario | |||||||
Length | 226.8 km (140.9 mi) | ||||||
Existed | May 23, 1927[1]–present | ||||||
Major junctions | |||||||
South end | ![]() | ||||||
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North end | ![]() ![]() ![]() | ||||||
Location | |||||||
Country | Canada | ||||||
Province | Ontario | ||||||
Major cities | Grand Bend, Goderich, Kincardine, Southampton, Port Elgin, Owen Sound | ||||||
Highway system | |||||||
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Ontario Highway 21, also called King's Highway 21, is a provincial highway in southwestern Ontario, Canada. It starts near Ontario Highway 402, almost half way between Sarnia and London. It runs north/northeast for 227 kilometres (141 mi) and ends in Owen Sound with Highway 6, Highway 10, and Highway 26.[2] The roadway is referred to as the Bluewater Highway because it remains very close to the eastern shoreline of Lake Huron.[3] It was started in 1927 as Highway 3 running across Kent and Lambton Counties.[2] In 1930 it was extended and renamed King's Highway 21.[2] It is one of Ontario's most treacherous roads for winter driving. Highway 21 is frequently closed during winter because of snow blowing off Lake Huron.[4]
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