Highway 103
Highway 103     1944–1958 route     Highway 12 concurrency (1965-1973)
Route information
Maintained by theMinistry of Transportation of Ontario
Length	58.3 km[1] (36.2 mi)
Existed	July 11, 1944[2]–May 15, 1976[3]
Major junctions
South end	Highway 69 inFoot's Bay
North end	Highway 12 inWaubaushene
Location
Country	Canada
Province	Ontario
Divisions	Simcoe County,Muskoka District
Highway system
Ontario provincial highways Current Former 400-series
←Highway 102 →Highway 105
Former provincial highways Highway 104 →

King's Highway 103, commonly referred to asHighway 103, was aprovincially maintained highway in theCanadian province ofOntario. Located in theDistrict Municipality of Muskoka andSimcoe County, the highway extended fromHighway 12 atWaubaushene toHighway 69 atFoot's Bay. Established in 1944, it was originally a short gravel highway connecting Waubaushene toPort Severn. In 1950 it was chosen as the future route of theTrans-Canada Highway and extended to Foot's Bay. It existed until 1976, when a series of renumberings eliminated the designation, replacing it with Highway 69;Highway 400 has since been built over the majority of the former route.

Highway 103 followed much of the route that Highway 400 now takes between Highway 12 at Coldwater and the former Highway 69 junction (Exit 189) south ofMactier. From there it followed what is now the east-west section of Lake Joseph Road to Foot's Bay, where it ended what wasHighway 69, laterHighway 169, and is presently Muskoka District Road 169 and the north-south section of Lake Joseph Road. Between Highway 400 and Foot's Bay, it is now designated as both Lake Joseph Road and Muskoka District Road 169.^[4][5]Between Coldwater and Waubaushene, the route wasconcurrent with Highway 12 for a brief period in the mid-1960s.^[1] From there, it crossed overMatchedash Bay and circled around the south and eastern shoreline ofSturgeon Bay to Port Severn. North of Port Severn, the route travelled through wilderness within the District of Muskoka for 38 kilometres (24 mi). At Foot's Bay, it encountered Highway 69, which continued east toHighway 11 inGravenhurst and north toParry Sound andSudbury.^[4]

Highway 103 was first designated duringWorld War II as a stub route of Highway 12 from Waubaushene to Port Severn. The 10.3 kilometres (6.4 mi) highway was assumed on July 19, 1944.^[2]The original routing until the late 1950s followed what is now Pine Street, Coldwater Road and Duck Bay Road through Waubaushene. After crossing Matchedash Bay, the route turned onto Quarry Road, then turned north and followed what is now the northbound lanes of Highway 400 straight into Port Severn. It turned west along Port Severn Road across the Trent–Severn Waterway and ended at Lone Pine Road. The entire route was gravel surfaced.^[6][7]Beginning in 1956,Highway 501 continued west toHoney Harbour.^[8]

When Ontario signed the Trans-Canada Highway Agreement on April 25, 1950, it had already chosen a Central Ontario routing via Waubaushene and Parry Sound;^[9]Highway 17 through theOttawa Valley was announced as a provincially-funded secondary route of theTCH the following day.[10]The route of Highway 103 was chosen as a jump-off point to connect the two places. Tenders for building the approximately 40-kilometre (25 mi) extension from Port Severn to Highway 69 at Foot's Bay were called on September 25, 1953, and included bypasses of Waubaushene and Port Severn.^[11]Construction was underway by the following year.^[12]The new paved Highway 103 was open by September 1958,^[13]although the complex three-bridge Port Severn Bypass did not open until the following spring.^[14]The old portions of the route through Waubaushene and Port Severn were transferred toTay Township on January 29, 1959.^[15]

In order to provide better route continuity for motorists travelling from Toronto to Sudbury, several highways were renumbered in the Muskoka area on May 15, 1976. The section of Highway 69 between Foot's Bay and its southern terminus of Highway 12 atBrechin was redesignated asHighway 169, while the entirety of Highway 103 was renumbered to form the new southern portion of Highway 69.^[3]The entirety of the former route (with the exception of the east-west section of Lake Joseph Road/Muskoka Road 169 west of Foot's Bay) has now been superseded by Highway 400.^[5]

The following table lists the major junctions along Highway 103, as noted by theOntario Department of Highways.^[1] The route is documented as it existed in 1968. 

Division	Location	km[1]	mi	Destinations	Notes
Simcoe	Coldwater	0.0	0.0	Highway 12 south –Orillia	Beginning of Highway 12 concurrency between 1965 and 1968[1]
	Waubaushene	8.9	5.5	Highway 12 north –Midland	End of Highway 12 concurrency, 1965 to 1968[1]
	Port Severn	14.8	9.2	Port Severn Cutoff
Muskoka		17.2	10.7	Highway 501 (Honey Harbour Road)	Now District Road 5[5]
	Georgian Bay	39.9	24.8	Highway 660
		56.6	35.2	Highway 612
	Foot's Bay	58.3	36.2	Highway 69 –Gravenhurst,Parry Sound
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

• Approximate former route of Highway 103 onGoogle Maps.Note that this routing is not exact; in several locations, the highway followed roads which are now residential or local in nature and cannot be directly accessed from the current Highway 400 route.

• Former Ontario provincial highways
• Former segments of the Trans-Canada Highway

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