Ontario Highway 503

Highway 503
Route information
Maintained by the Ministry of Transportation of Ontario
Length	116.8 km[1] (72.6 mi)
Existed	May 9, 1956[2]–January 1, 1998
Major junctions
South end	Highway 48 in Kirkfield
Major intersections	Highway 35 in Norland  Highway 121 in Kinmount
East end	Highway 118 – Tory Hill
Location
Country	Canada
Province	Ontario
Divisions	Victoria County, Peterborough County, Haliburton County
Villages	Kirkfield, Sebright, Norland, Kinmount, Gooderham, Tory Hill
Highway system
Ontario provincial highways Current Former 400-series
← Highway 502 → Highway 504

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.

The route of former Highway 503 passes through several unincorporated villages along its length, including Sebright, Uphill, Norland, Dongola, Kinmount and Gooderham, in addition to the villages at either terminus. Outside of those communities the route is generally forested, but provides access to recreational cottages surrounding the many lakes that dot the region.