The Ontario Matron Stakes is a Canadian Thoroughbred horse race run annually at Woodbine Racetrack in Toronto, Ontario. Held during the third week of July, it is open to fillies and mares, age three and older. A grade 3 event, raced over a distance of 11/16 miles on Polytrack synthetic dirt, the race currently offers a purse of $150,000 with an addition $50,000 for Ontario bred horses from the Ontario Thoroughbred Improvement Program (T.I.P.). The Ontario Matron Stakes was first run in 1979. Until 2006 it was known as the Ontario Matron Handicap.