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This is a list of secondary highways in Rainy River District, most of which serve isolated and sparsely populated areas in the Rainy River District of northwestern Ontario.
Provincial Highway 600 is a secondary highway in the Canadian province of Ontario. Its total length is 86.4 kilometres (53.7 mi). Its western terminus is Highway 11 in Rainy River, and its eastern terminus is at Highway 71. It is also one of only a few Ontario highways that are still gravel.
Highway 602 is a secondary highway in the Canadian province of Ontario. Its total length is 44.6 kilometres (27.7 mi). Its western terminus is Highway 11 in Emo, and its eastern terminus is at Highway 71 in Fort Frances.
Highway 633 was assumed by the Department of Highways, predecessor to the modern Ministry of Transportation, on October 29, 1959. It has remained unchanged since then.
Ontario Department of Highways (March 31, 1956). "Appendix No. 3 – Schedule of Assumptions of Sections of the King's Highway System for the Fiscal Year". Annual Report (Report). pp. 203, 216.
Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1956.
"Ontario Secondary Roads Now Designated 500, 600". The Globe and Mail. Vol. 112, no. 33, 119. 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
^ Ontario Department of Highways (March 31, 1960). "Appendix No. 3A – Schedule of Designations and Re-designations of Sections of the King's Highway and Secondary Highway Systems for the Fiscal Year Ending March 31, 1959". Annual Report (Report). pp. 237–239. Retrieved February 8, 2021.