The highway links several remote First Nation hamlets to the major highway routes of the region. However, the only places of noteworthy size are the village of Magnetawan and the town of Burk's Falls. It is concurrent with Highway 124 for 15.4 kilometres (9.6 mi).
Secondary Highway 522B, commonly referred to as Highway 522B, is a provincially maintained highway in the Canadian province of Ontario. The highway is 1.9 kilometres (1.2 mi) in length, connecting Highway 522 within Trout Creek with Highway 11 to the north. The highway was created in late 2002 when the Trout Creek Bypass of Highway 11 opened; Highway 522B forms a portion of the former routing.
Secondary Highway 612, commonly referred to as Highway 612, is a secondary highway in the Canadian province of Ontario. Located in the Parry Sound District, the highway extends for 4.4 kilometres (2.7 mi) from a junction with Lake Joseph Road, the former route of Highway 69, outside of Gordon Bay to the boundary of Parry Sound District with the regional municipality of Muskoka near a junction with Healey Lake Road.
At the boundary, the roadway continues southward as Muskoka Road 11 through MacTier. Prior to 1997, this county road was also part of Highway 612.
Secondary Highway 644 commonly referred to as Highway 644, is a secondary highway in the Canadian province of Ontario. It is a very minor and extremely short route, and holds the distinction of being Ontario's shortest posted highway at only 800 metres (1/2 mile) in length.
Secondary Highway 654, commonly referred to as Highway 650, is a secondary highway in the Canadian province of Ontario. The highway is 23.1 kilometres (14.4 mi) in length, connecting Highway 534 south of Nipissing with Highway 11 in Callander. The route was designated in 1964, and has remained unchanged since then. It is sparsely travelled, but paved throughout its length.
^ ab"Ontario Secondary Roads Now Designated 500, 600". 112 (33,119). The Globe and Mail. February 4, 1956. p. 4. Two new Ontario road numbers appear on the province's 1956 official road map which will be ready for distribution next week. The new numbers are the 500 and 600 series and designate hundreds of miles of secondary roads which are wholly maintained by the Highways Department. More than 100 secondary roads will have their own numbers and signs this year. All of these secondary roads were taken into the province's main highways system because they form important connecting links with the King's Highways