Ontario Highway 637
| Route information | ||||
|---|---|---|---|---|
| Maintained by Ministry of Transportation of Ontario | ||||
| Length | 67.7 km (42.1 mi) | |||
| Existed | July 20, 1962–present | |||
| Major junctions | ||||
| West end | Channel Street in Killarney | |||
| East end | Highway 69 at Rock Bay | |||
| Location | ||||
| Country | Canada | |||
| Province | Ontario | |||
| Highway system | ||||
| ||||
Secondary Highway 637, commonly referred to as Highway 637 is a provincially maintained secondary highway in the Canadian province of Ontario. Located entirely within Sudbury District, the highway connects Highway 69 to the primary townsite of Killarney, 67.7 kilometres (42.1 mi) away, as well as providing access to Killarney Provincial Park.
The highway was opened in 1962. Prior to its completion, the community of Killarney relied primarily on water transport via Georgian Bay and the North Channel. The route has remained unchanged since then, aside from a very short extension to meet the realigned Highway 69 (future Highway 400) interchange.