Secondary Highway 638, commonly referred to as Highway 638, is a provincially maintained secondary highway located in the District of Algoma in the Canadian province of Ontario. The route begins at Highway 17B in Echo Bay and travels eastward to Ophir, where it turns south to Bruce Mines, ending 1.1 km (0.7 mi) north of Highway 17. The north–south portion of the route was designated in 1956 as Highway 561. In 1962, Highway 638 was designated from Echo Bay to Highway 561, as well as a segment of the latter route from Ophir to Dunns Valley. The highway took on its current routing in 1989, assuming the route of Highway 561 south from Ophir to Bruce Mines; the section of Highway 638 from Ophir to Dunns Valley was renumbered as Highway 670.
Secondary Highway 522, commonly referred to as Highway 522, is a provincially maintained highway in the Canadian province of Ontario. The highway is 109.6 kilometres (68.1 mi) in length, connecting Highway 69 near Cranberry with Highway 11 at the community of Trout Creek. Highway 522 serves as the only link between these two routes south of Highway 17 and north of Highway 124. It is often used to access Grundy Lake Provincial Park, a popular camping area for northbound travellers.
Secondary Highway 502, commonly referred to as Highway 502, is a provincially maintained secondary highway in the Canadian province of Ontario. The highway is 151.7 kilometres (94.3 mi) long, connecting Highway 11 east of Fort Frances with Highway 17 in Dryden, via Highway 594. It also carries the Great River Road designation.
Secondary Highway 516, commonly referred to as Highway 516, is a provincially maintained secondary highway in the Canadian province of Ontario. The highway is 103.6-kilometre (64.4 mi) in length, connecting Highway 72 and Highway 642 near Sioux Lookout with Highway 599 north of Savant Lake.
Secondary Highway 526, commonly referred to as Highway 526, is a provincially maintained secondary highway in the Canadian province of Ontario. It is a short and lightly travelled route that connects Highway 69 with the community of Britt.
King's Highway 71, commonly referred to as Highway 71, is a provincially maintained highway in the Canadian province of Ontario. The 194-kilometre-long (121 mi) route begins at the Fort Frances–International Falls International Bridge in Fort Frances, continuing from US Highway 53 (US 53) and US 71 in Minnesota, and travels west concurrently with Highway 11 for 40 kilometres (25 mi) to Chapple. At that point, Highway 11 continues west while Highway 71 branches north and travels 154 kilometres (96 mi) to a junction with Highway 17 just east of Kenora. Highway 71 forms a branch of the Trans-Canada Highway for its entire length, with the exception of the extremely short segment south of Highway 11 in Fort Frances.
King's Highway 28, commonly referred to as Highway 28, is a provincially maintained highway in the Canadian province of Ontario. The southwest–northeast route extends from Highway 7 east of Peterborough, to Highway 41 in Denbigh. The route passes over undulating hills before entering the Canadian Shield near Burleigh Falls, and gradually turns eastward.
Secondary Highway 531, commonly referred to as Highway 531, is a provincially maintained secondary highway in the Canadian province of Ontario. It connects Highway 17 east of North Bay with the community of Bonfield. The 3.5-kilometre (2.2 mi) route was established in 1956, and has remained the same since then. It passes through a forested area and has several private residences located along its length. Aside from Maple Road, its southern terminus, and Highway 17, its northern terminus, Highway 531 encounters no roads along its length.
Secondary Highway 503, commonly referred to as Highway 503, was a provincially maintained secondary highway in the Canadian province of Ontario. The 116.8 km (72.6 mi) route existed between 1956 and 1998. Between 1956 and 1963, the highway stretched from Kirkfield to Sebright, and then along the Monck Road from Sebright to Kinmount, entirely within Victoria County. In 1964, the route was extended to Highway 121 in Tory Hill along the route of Highway 500 through the counties of Peterborough and Haliburton. In 1998, the route was transferred to the various counties in which it resided. Today it is known as Kawartha Lakes City Road 6 and 45, Peterborough County Road 503 and Haliburton County Road 503.
Secondary Highway 649, commonly referred to as Highway 649, was a provincially maintained secondary highway in the Canadian province of Ontario. Now known as Kawartha Lakes Road 49, and locally as East Street North in Bobcaygeon, it is a municipally-maintained class-3 roadway located mostly along the boundary between the city of Kawartha Lakes and Peterborough County. The 18-kilometre-long (11 mi) route begins in Bobcaygeon at a junction with former Highway 36, and proceeds north along the boundary between Kawartha Lakes and Peterborough County to a junction with former Highway 121 just south of Kinmount.
Secondary Highway 529, commonly referred to as Highway 529, is a provincially maintained secondary highway in the Canadian province of Ontario. Located within Parry Sound District, the highway follows a 25.7-kilometre (16.0 mi) route, from its southern terminus at Highway 69 near Pointe au Baril to its northern terminus at the Highway 69 crossing of the Magnetawan River near Byng Inlet. Two spur routes, Highway 529A and Highway 645, branch off the highway to serve the communities of Bayfield Inlet and Byng Inlet, respectively. The route was established along the present alignment of Highway 529A in 1956. It was relocated in 1961 along the former routing of Highway 69 when a bypass opened through the area, with the former alignment being renumbered as Highway 529A.
Tertiary Highway 810, commonly referred to as Highway 810, is a provincially maintained access road, extending from Bull Lake to Richie Falls alongside the River aux Sables north of Massey. A northerly extension of Highway 553, the road was established in 1974 and has remained unchanged since then.
King's Highway 70, commonly referred to as Highway 70, was a provincially maintained highway in the Canadian province of Ontario, which provided a shorter route from Highway 6 and Highway 21 in Springmount to Highway 6 in Hepworth. The route, which now forms part of Highway 6, was 15.1 kilometres (9.4 mi) long and travelled in a southeast–northwest direction west of Owen Sound. The route followed an early trail blazed by deputy surveyor Charles Rankin in 1842 that was upgraded to a modern road in the 1920s. Highway 70 was designated in 1965 and renumbered as Highway 6 in 1997. Another Highway 70 existed near Kenora between 1937 and 1959 before being renumbered as Highway 71. This designation was applied along the newly opened Heenan Highway, shortly after the Department of Highways (DHO) began numbering routes in northern Ontario. However, a series of renumberings in 1960 led to the entire length becoming part of Highway 71.
Highway 617 
Highway 619 
Highway 621 
Highway 71 / TCH near Black Hawk 
