The Seaway Stakes is a Canadian Thoroughbred horse race run annually during the first part of September at Woodbine Racetrack in Toronto, Ontario. A Grade III race since 2004, it is open to fillies and mares aged three and older. Contested over a distance of 7 furlongs on Polytrack synthetic dirt, it currently carries a purse of $150,000. There was no race run in 1965 and 1966. In 1984 it was run in two divisions. Inaugurated in 1956, over the years the race has been contested at various distances.
| Stakes Race | Grade | Purse |
|---|---|---|
| Eclipse Stakes | III | $150,000 |
| Nassau Stakes | II | $300,000 |
| King Edward Stakes | II | $250,000 |
| Highlander Stakes | II | $200,000 |
| Singspiel Stakes | III | $150,000 |
| Queen's Plate Stakes | I | $1,000,000 |
| Dominion Day Stakes | III | $200,000 |
| Dance Smartly Stakes | II | $300,000 |
| Ontario Matron Stakes | III | $150,000 |
| Nijinsky Stakes | II | $300,000 |
| Royal North Stakes | III | $150,000 |
| Sky Classic Stakes | II | $250,000 |
| Ontario Colleen Stakes | III | $150,000 |
| Play the King Stakes | II | $200,000 |
| Seaway Stakes | III | $150,000 |
| Natalma Stakes | III | $200,000 |
| Summer Stakes | III | $250,000 |
| Canadian Stakes | II | $300,000 |
| Northern Dancer Turf Stakes | I | $500,000 |
| Woodbine Mile Stakes | I | $1,000,000 |
| Selene Stakes | III | $250,000 |
| Grey Stakes | III | $200,000 |
| Nearctic Stakes | I | $500,000 |
| E.P. Taylor Stakes | I | $1,000,000 |
| Canadian International Stakes | I | $1,500,000 |
| Autumn Stakes | II | $150,000 |
| Kennedy Road Stakes | III | $150,000 |
| Bessarabian Stakes | III | $150,000 |
| Valedictory Stakes | III | $150,000 |
