Ontario Highway 503 Quick Facts:
- Years in Existence: 1956-1998
- Current Status: Decommissioned in 1998
- Current Name: Kawartha Lakes Roads 6 & 45, Peterborough Road 503 & Haliburton Road 503
- Location: Central Ontario
- Counties Served: Simcoe, Victoria (Kawartha Lakes), Peterborough & Haliburton
- Towns Served: Kirkfield, Norland, Kinmount, Gooderham & Tory Hill
- Southern Terminus: Hwy 48 Junction - Kirkfield
- Eastern Terminus: Hwy 121 (Now Hwy 118) Junction - Tory Hill
- Length in 1997: 116.8 km / 72.5 miles
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Secondary Highway 503 Sign © Cameron Bevers
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